Sell Your Calculators

Sell Your Calculators - (news) Copyright (c) 2010,2011 AO Design -. All rights reserved. http://www.sellyourcalculators.com/ Your Calculator Seling Site A professional company for selling your calculators en-us Thu, 05 Mar 2026 05:53:26 -0600 5 Sell Your Calculators 355 74 http://www.sellyourcalculators.com/ http://www.sellyourcalculators.com/images/logo.jpg Calculation or Computation - That is the Question http://www.sellyourcalculators.com/blog/calculation-or-computation-that-is-the-question http://www.sellyourcalculators.com/rss/calculation-or-computation-that-is-the-question Your Calculator Seling Site Fri, 03 Nov 2017 07:24:00 -0500 <h1>Elementary Calculation</h1> <img style="margin: 5px; float: left;" src="https://sellyourcalculators.com/im_images/Roman_counting_board.jpg" alt="Roman Counting Board" width="100" height="84" />The deliberate process known as <a href="https://sellyourcalculators.com/blog/mental-calculation-showcasing-the-awesome-power-of-the-human-mind">calculation</a> transforms one or more data sets into one or more results, with variable change. In the beginning, calculation was <a href="https://sellyourcalculators.com/blog/mental-calculation-showcasing-the-awesome-power-of-the-human-mind">a simple arithmetical process</a>. Early calculation used small stones as counters. Simply by adding or removing the appropriate number of stones, one could easily calculate everything from inventory of possessions to the cost of buying and selling goods. As calculation became more complex, stone counters gave way to counting boards. The more advanced counting boards developed in ancient Rome and Greece had grooved columns that were labeled by the place each number held. M = thousands, C = hundreds, X = tens, I = ones. <img style="margin: 5px; float: right;" src="https://sellyourcalculators.com/im_images/abacus.jpg" alt="abacus" width="100" height="77" />In approximately 500 BC, the abacus was invented. Still in limited use today, the abacus lost popularity when the first slide rule  was developed in the 1600’s. This device, in various forms, was widely used until the early 1970’s when the first pocket calculator arrived on the scene and rendered it obsolete. <h2>Reality Calculation</h2> <img style="float: right; margin: 5px;" src="https://sellyourcalculators.com/im_images/pocket_calculator.jpg" alt="pocket calculator" width="100" height="96" />Arithmetical calculation achieved using an algorithm is the most familiar type of calculation for many. This form of <a href="https://sellyourcalculators.com/blog/the-language-of-math-to-infinity-and-beyond">mathematics</a> is the study of numbers and the properties of traditional operations between them. These include addition, subtraction, multiplication, and division. Arithmetical calculation, along with algebra, geometry, and analysis, comprise what is known as “number theory.” Number theory, itself, is the top-level platform of <a href="https://sellyourcalculators.com/blog/reality-math">modern mathematics</a>. Not all calculation, however, is as straight forward as the Arithmetical calculation. A rather vague model called Heuristics takes calculation in a whole different direction.  This approach to problem solving uses practical methods which are not definitive or even optimal, but are designed to be sufficient to reach the immediate stated goal. Heuristic calculation produces ranges of possibilities rather than exact answers. Examples include the rule of thumb, guesstimation, intuitive judgement, profiling, and common sense. This form of calculation is often used when formulating a competition strategy or determining the chances of successful personal relationships, in statistical estimations like election results or opinion polls, or in complex hedging strategies like those used by investment banks and hedge fund managers. Heuristic calculation can also be applied to learning or discovery.  <h3>The Calculation/Computation Question</h3> Given all of the above information, is calculation the same as <a href="https://sellyourcalculators.com/blog/the-art-of-math">computation</a>? Sort of, but not exactly. While calculation is a prerequisite component of computation, some differences exist.  Actually, computation is defined as any type of calculation that includes both arithmetical and non-arithmetical steps and follows a defined model, for example, an algorithm. The primary difference is in the functionality of a calculator vs a computer.  Both devices are capable of rapid mathematical calculation, however, the calculator is limited to numbers calculation, can only complete one task at a time, and is dependent upon input provided throughout the process. The computer, by comparison, can be programmed to multi-task and complete entire complex calculations without assistance. That being said, do you calculate or do you compute?  If you are finding more and more often that your calculations simply do not compute, perhaps it’s time for some new technology. Before investing in a new, high-tech replacement, however, put your old calculator out to pasture at <a href="http://www.sellyourcalculators.com/">SellYourCalculators.com</a>. Our buy-back program for used calculators offers competitive prices, quick turn-around time, and outstanding customer service. Let us help you calculate the financial benefits today.  <a href="file:///C:/Users/marga/Documents/CyberLink">Contact us</a> for more information. Mental Calculation - Showcasing the Awesome Power of the Human Mind http://www.sellyourcalculators.com/blog/mental-calculation-showcasing-the-awesome-power-of-the-human-mind http://www.sellyourcalculators.com/rss/mental-calculation-showcasing-the-awesome-power-of-the-human-mind Your Calculator Seling Site Sun, 01 Oct 2017 20:16:00 -0500 <h1>Mental Calculation…In the Beginning</h1> <img style="margin: 5px; float: left;" src="https://sellyourcalculators.com/im_images/flash_cards.png" alt="Math flash cards" width="160" height="160" />Mental calculation is defined as <a href="https://sellyourcalculators.com/blog/reality-math">arithmetical calculations</a> solved using only the human brain. Mental calculation, in fact, is one of the earliest forms of problem solving. In the “good old days,” mental calculation began with memorization. Those of a certain age vividly remember flash cards as the memorization weapon of choice, skillfully wielded by elementary school teachers everywhere. Over and over, students called out answers at an ever-increasing rate of speed until every answer was correct every time. Little by little, the repetitive nature of flash cards helped build a strong foundation for the more <a href="https://www.sellyourcalculators.com/blog/why-bother-with-upper-level-math">advanced calculations of higher math</a>. As student proficiency in mental calculation increased, contests, complete with achievement certificates, medals, and trophies, were created to showcase the mental agility of the new young math superstars. <h2>Mental Calculation and the New Math</h2> <img style="margin: 5px; float: left;" src="https://sellyourcalculators.com/im_images/new_math.jpg" alt="New Math" width="250" height="119" />All was well with <a href="https://sellyourcalculators.com/blog/reality-math">mental calculation</a> through memorization until 1957. In that year, the Russians jumped ahead of the US in the space race by launching a rocket named Sputnik. One year later, President Eisenhower signed the National Defense Education Act and government money poured into the American Educational System to enhance the study of math and science. With the arrival of the 1960s a plan for this enhancement was implemented and <a href="https://sellyourcalculators.com/blog/the-language-of-math-to-infinity-and-beyond">“New Math”</a> was born.  In place of the simple, straight-forward memorization approach to problem solving, <a href="https://sellyourcalculators.com/blog/the-language-of-math-to-infinity-and-beyond">New Math</a> emphasized conceptual understanding. Students were encouraged to see numbers as sets of objects rather than random symbols.   Example:   53 + 37 = ? For fifty years, <a href="https://sellyourcalculators.com/blog/the-language-of-math-to-infinity-and-beyond">New Math</a> was the standard for America’s students. Then in 2010, an even more complex approach to problem solving, Common Core, was introduced. The stated goal of Common Core was to enable students to think more like mathematicians. Incorporating many of the concepts of New Math, Common Core went a step further by debunking the established technique of simplifying answers. Believing that this process didn’t add much to the <a href="https://sellyourcalculators.com/blog/the-language-of-math-to-infinity-and-beyond">understanding of mathematics</a>, the Common Core developers removed it. Fractional calculation by cross-multiplying was also eliminated. Instead of solving equations, students were now expected to analyze functions.   Example:         54 – 27 = ?      <img style="float: left; margin: 5px;" src="https://sellyourcalculators.com/im_images/common_core_math_example.jpg" alt="mental calculations" width="250" height="141" />       In theory, some Common Core functions are a part of everyday life. Example: If an item is purchased for $2.67 and a ten-dollar bill is used to pay for it, how much change is due. Mental calculation can easily determine the answer. $2.67 + .33 = $3.00.                                        $3.00 + $7.00 = $10.00           .33 + $7.00  Therefore:         $7.33 is due in change  In the classroom setting, however, Common Core was very poorly implemented. Instead of a careful explanation of the concepts, and proper teacher/student education, Common Core was thrust upon the US educational system “cold turkey.” As a result, math became so confusing that students, parents, and even teachers had difficulty understanding it. Instead of thinking like mathematicians, many students simply shut down. <a href="https://sellyourcalculators.com/blog/reality-math">Mental calculation</a> took a serious hit.   <h3>A Few Tricks to Put the Fun Back in Mental Calculation.</h3> Calculation confusion now reigned supreme, but <a href="https://sellyourcalculators.com/blog/reality-math">mental calculation</a> was not out of the game just yet. There were still a few tricks up its mathematical sleeve.   The benefits of mental calculation are 3-fold. <ol> <li>It saves time and is always available, particularly handy in situations where technical aids, like a calculator, are not allowed.</li> <li>It keeps the brain sharp through mental exercise.</li> <li>It adds a bit of mystery and magic to problem solving.</li> </ol> Here are a few mental calculation tricks to make you a mathematical star: 1.      Multiply 2-digit numbers by 11.  Try  53 x 11 = ? 1st: look at the number being multiplied (53) 2nd: add the two digits together   (5 + 3 = 8) 3rd: insert the answer from step 2 between the digits of the original   (5  8  3) The answer: 53 x 11 = 583  Ta Dah! But wait. What if the number in step 2 is a double-digit number? Let’s give that a try… instead of 53, use 58.   (58 x 11 = ?) 1st: add the two digits   (5 + 8 = 13)   Now, instead of a single first digit, there are two – the 5 from 58 and the 1 from 13. 2nd: add both first digits together   (5 + 1 = 6).    The first digit of the answer is 6 3rd: insert the second digit from step 1 (3) next to the digit from step 2.   (6  3) 4th: close with the second digit of the original number (8).   (6  3  8) The Answer: 58 x 11 = 638  Pretty slick, eh!             <ol> <li>2.      Multiply 3-digit numbers by 11.  Try 354 x 11 = ? </li> </ol> Multiplying 3-digit numbers is similar to multiplying 2-digit numbers with one small twist. The original number (354) will be split apart. The middle number of the original (5) will be eliminated and instead of one number inserted into the middle, there will be two. 1st: add digit one to digit two.   (3 + 5 = 8) 2nd: add digit three to digit two.   (4 + 5 = 9) 3rd: insert the answer from step 1 beside the first number of the original.   (3  8) 4th: insert the answer from step 2 next. (3  8  9) 5th: finally, close with the third digit of the original number (3 8 9 4)   The Answer: 354 x 11 = 3894  Genius!!   <ol> <li>3.      Squaring a number.  Select a number that ends in 5…let’s use 352 = ?</li> </ol> When squaring a number that ends in 5, the answer will always end with 25. 1st: multiply the first digit (3) by the next highest digit (4).  4 x 3 = 12 2nd: insert 25 at the end  (12  25) The Answer: 352 = 1225  Woo Hoo – you’re flying now! There you have it. <a href="https://sellyourcalculators.com/blog/reality-math">Mental calculation</a> can really be fun. If, however, your brain is exhausted from all this mental exercise, there are R & R remedies available. A <a href="https://sellyourcalculators.com/blog/the-graphing-calculator-and-dimensional-thinking">good calculator</a> can carry you through until you’re ready to play <a href="https://sellyourcalculators.com/blog/reality-math">“Mental Calculation”</a> again. Maybe you have an old calculator that just doesn’t do the job anymore and you’d like to upgrade. Whether the calculator you need is basic, scientific, or financial, it doesn’t take a mental wizard to know that there will be some cost involved.  Why not let <a href="https://sellyourcalculators.com/">SellYourCalculators.com</a> help defray that cost? Our <a href="https://sellyourcalculators.com/about/">buy-back program</a> for used calculators offers competitive prices, quick turn-around time, and outstanding customer service to get you back in the game ASAP.  <a href="http://www.sellyourcalculators.com/contact/">Contact us today</a> for more information. Calculators, Calories, and Candied Yams http://www.sellyourcalculators.com/blog/calculators-calories-and-candied-yams http://www.sellyourcalculators.com/rss/calculators-calories-and-candied-yams Your Calculator Seling Site Mon, 14 Nov 2016 16:05:00 -0600 <h1>Calculating The Dietary Damage Of The Holiday Season</h1> <img style="float: left; margin: 5px;" title="holiday dinner" src="http://sellyourcalculators.com/im_images/desktop-christmas-dinner-holiday-free.jpg" alt="" width="200" height="125" />Get <a href="http://www.sellyourcalculators.com/">your calculator</a> ready. Halloween is behind us and we’re rapidly closing in on that most wonderful time of the year...The Holiday Season...a festive time filled with family, friends, and food! Tables are laden with the special dishes that only appear at this time of year. Will power weakens and sticking to a diet becomes nearly impossible. If, however, you wonder just how much your diet will suffer, <a href="http://www.sellyourcalculators.com/blog/the-fitness-phenomenon">your calculator and some simple math</a> can give you the bad news before it’s too late.  <h2></h2> <h2>Calculating The Traditional Holiday Meal</h2> <img style="margin: 5px; float: right;" title="counting calories" src="http://sellyourcalculators.com/im_images/calories.jpg" alt="nutrition facts" width="250" height="166" />No matter how carefully you try to limit your intake, <a href="http://www.sellyourcalculators.com/blog/reality-math">your calculator</a> will soon show you that even a holiday meal is stacked against you. If you prefer white meat, 8 oz of skinless turkey breast is 305 calories. A turkey leg, however, boosts the calorie count to 415. Add in ½ cup of dressing at 239 calories, and 1 cup of mashed potatoes with gravy at 235 calories and your diet loses to deliciousness. With some items, you can choose how high or low the calorie count will be. For example, 1 cup of canned, processed cranberry sauce is more than 400 calories. The same amount of fresh cranberry relish is only 67 calories. The same is true for green beans. Plain, cooked green beans come in at 31 calories. Make that a green bean casserole with the addition of a can of cream of mushroom soup, ½ cup of milk, and a topping of French fried onion rings and you’ve increased your calorie intake to 227. Finally, 1 cup of cooked yams is 258 calories. Candy those yams with sugar, butter, and cinnamon or a topping of mini marshmallows and you’ll have to cut your portion to just 3 ounces. If you prefer pumpkin pie for dessert, 1 slice is just over 200 calories. If pecan pie is your choice, the calorie count more than doubles to over 500. Adding whipped cream adds an additional 40 calories per tablespoon to both. <h3>Calculating Your Choices</h3> <a href="http://www.sellyourcalculators.com/blog/the-language-of-math-to-infinity-and-beyond"><img style="float: left; margin: 5px;" title="calories calculator" src="http://sellyourcalculators.com/im_images/calories_counter_21747_1_1_730.gif" alt="" width="200" height="225" />Using your calculator</a> makes the simple addition and subtraction of the calories in your choices an easy task. The not-so-surprising fact is that most Americans will consume over 1600 calories in just 1 holiday meal. Don’t let these figures cause you mental anguish. Enjoy the Holiday Season to the fullest. There are always those <a href="http://www.sellyourcalculators.com/blog/the-fitness-phenomenon">New Year’s resolutions</a> to help get you back on track...till next year. If <a href="http://www.sellyourcalculators.com/blog/the-fitness-phenomenon">your current calculator</a> needs to be upgraded before the holidays, visit <a href="http://www.sellyourcalculators.com/">SellYourCalculators.com</a> and check out <a href="http://www.sellyourcalculators.com/about/">our calculator buyback program</a>. For nearly a decade, our premium prices, quick turn-around time, and outstanding customer service have made us <a href="http://www.sellyourcalculators.com/">the premier buyback destination</a> for no longer needed calculators. <a href="http://www.sellyourcalculators.com/contact/">Contact us today</a> for more information. The Fitness Phenomenon http://www.sellyourcalculators.com/blog/the-fitness-phenomenon http://www.sellyourcalculators.com/rss/the-fitness-phenomenon Your Calculator Seling Site Fri, 02 Sep 2016 05:00:00 -0500 <h1>The Increasing Obsession With Fitness</h1> <img style="margin: 5px; float: left;" src="http://sellyourcalculators.com/im_images/v-sit.jpg" alt="fitness" width="200" height="155" />Fitness! The very word conjures up visions of a well-toned body in those who are already fit and nightmares of torture and pain in those who aren’t. Fitness buffs today have become almost “cult-like” in their devotion to physical perfection. The rest of us are less obsessed and many see fitness as a New Year’s resolution that we make, break, and start again.    Fitness, however, is more than just looking good. Our very lives may be dependent upon how fit we are. For example, metabolic syndrome is a combination of factors (excessive belly fat, high blood pressure, and high levels of triglycerides) that together increase the risk of cardiovascular disease. <h2>How To Determine Fitness Levels  </h2> As with many other things, achieving fitness begins with baby steps. Jumping into a complex fitness regime without laying the groundwork is sure to end in failure. Determine your goal, then work slowly and steadily to achieve it. This is especially important if you haven’t exercised regularly. Fitness is assessed in 4 key areas: aerobic fitness, muscular strength and endurance, flexibility, and BMI. <ul> <li>Check aerobic fitness:</li> </ul> Take a brisk 1 mile (1.6 km) walk then check your pulse. You can do this at the carotid artery (located in the neck beside the windpipe) or at the radial artery (located in the wrist just below the thumb). Once you’ve located your pulse, count the number of beats in 10 seconds and multiply by 6 to get your heart rate/minute.       15 beats/10 seconds x 6 = 90 beats/minute <ul> <li>Measure muscular strength and endurance: Push Ups</li> </ul> Push-ups, whether modified or classic, can help measure muscular strength.  Modified push-ups are done face down with the knees on the floor, classic push-ups with the toes on the floor. <ul> <li>Assess flexibility: Sit-and-Reach Test </li> </ul> The sit-and-reach test is a simple way to measure the flexibility of the backs of your legs, your hips and your lower back. Sit on the floor with the soles of your feet even with the 15-inch (38-cm) mark on a yardstick. Stretch forward as far as you can and record the distance . <ul> <li>Estimate body composition: body mass index</li> </ul> BMI stands for body mass index and is calculated as weight over height squared (weight(kg)/[height(m)]2). To calculate in pounds and inches, multiply weight by 0.45 (the metric conversion factor). An individual that weighs 150 lbs and is 5 feet 4 inches tall has a height in inches of (5 x 12) + 4 = 64" 1. Using the first part of the formula we multiply the weight by 703. 150 x 703 = 105450 2. Using the second part of the formula we multiply the height by itself. 64 x 64 = 4096 3. Finally we divide the first figure by the second. 105450 / 4096 = 25.74 Current guidelines indicate that a BMI below 18.5 = Underweight  18.5 - 24.9 = Normal     25 - 29.9 = Overweight     30.0 + = Obese According to these established guidelines, this individual would be considered overweight. <ul> <li>Resting Heart Rate</li> </ul>             Resting heart rate can be measured in one of two ways: <ol> <li>Use a heart-rate monitor, sit quietly for 10 minutes and use the lowest reading you get</li> <li>Sit quietly for 10 minutes, count the pulse for 30 seconds and multiply by 2 </li> </ol> <h3>Barriers To Fitness </h3> Sticking to a regular exercise plan isn't easy. It requires dedication and determination. Choose a plan that challenges you but doesn’t exceed your ability. Remember, too difficult leads to discouragement and failure - too easy limits progress. There are many excuses to avoid exercise: <ul> <li>No time</li> <li>Exercise is boring</li> <li>No energy</li> <li>Not athletic</li> <li>High health club fees</li> </ul> Don’t let anything discourage your efforts. Keep your eye on the goal and work through it. The best way to monitor your progress is to keep a journal and the date and enter your information each time you exercise. To ensure accuracy, keep your trusty calculator by your side. If you need an upgrade, why not sell your current model?  <img style="float: right; margin: 5px;" src="http://sellyourcalculators.com/im_images/dollar_sign.jpg" alt="dollar sign" width="91" height="91" /><a href="http://www.sellyourcalculators.com/">SellYourCalculators.com</a>  offers a buy-back option that is second to none. Our quick turn around time, outstanding customer service, and competitive prices will help with the price of a new model that will get you started on the road to fitness. time you exercise. To ensure accuracy, keep your trusty calculator by your side. If you need an upgrade, why not <a href="http://www.sellyourcalculators.com">sell your current model</a>? PEMDAS - How To Get from Here To There In Six Steps Or Less http://www.sellyourcalculators.com/blog/pemdas-how-to-get-from-here-to-there-in-six-steps-or-less http://www.sellyourcalculators.com/rss/pemdas-how-to-get-from-here-to-there-in-six-steps-or-less Your Calculator Seling Site Wed, 11 May 2016 15:48:00 -0500 <h1>PEMDAS – What’s In A Name</h1> <img style="margin: 5px; float: left;" src="http://www.sellyourcalculators.com/im_images/pemdas.gif" alt="pemdas" width="250" height="88" />In the arena of equation calculation, PEMDAS is the name of the game. The acronym PEMDAS, which stands for Parentheses, Exponents, Multiplication, Division, Addition, Subtraction, defines the order in which the components of a complex equation are completed. Its purpose is to allow equations to be consistently solved correctly.  Stray from the PEMDAS path and you’ll find yourself lost in the bog of error. A fatal misstep, especially if you’re trying to tout your math prowess on a site like Facebook, where tricky little equations are quite popular.   The “parentheses” portion of PEMDAS is particular to the US. In other English speaking countries, “brackets” is the preferred term. This changes the acronym to BEMDAS.  Common terminology creates other variations in the acronym as well. For example, when using the term Indices in place of Exponents, the acronym becomes BIMDAS. The acronym GEMS is a short, sweet variation of PEMDAS that breaks the order of operations into 4 concise steps – Grouping Symbols (parentheses, brackets, etc), Exponents, Multiplication/Division (from left to right), Subtraction/Addition (from left to right). Other variations come from the order of operations itself. In equation calculation, multiplication and division have equal weight, as do addition and subtraction. For consistency, therefore, these functions are completed working from left to right.  If multiplication appears first, PEMDAS is correct. If division appears first, it would be PEDMAS. Then there is BODMAS. The most commonly used acronym outside the US, it changes both the P and E of PEMDAS to B for Brackets and O for Order, and reverses the order of the multiplication and division functions. Whichever variation you choose, PEMDAS and its acronym cousins will keep you on the path to success. Accurate navigation of the order of operations depends upon it. PEMDAS – Order Is Everything        Whether you use PEMDAS or any of its variations, the order of operations remains the same.         <ul> <li> 1.  Parentheses or Brackets  ( ) [  ] – any functions within the grouping symbols are always calculated first. If the equation has more than one parenthetical calculation, begin with the innermost and work outward. Once a parenthetical calculation has been reduced to a single number, the parentheses can be removed.</li> </ul> 3 + (12 ÷ 3) x 4 =                                   2x { 1 + [ 4x(2+1) + 3]} = 3 + 4 x 4 =                                              2x { 1 + [ 4x(3) + 3]} = 3 + 16 = 19                                             2x { 1 + [ 12 + 3]} =                                                             2x { 1 +  15} =                                                             2 x 16 = 32 <ul> <li>2.  Order, Index, or Exponent  ² – These terms indicate operations containing powers or indices. All calculations in this category, like squaring or calculating square root, are performed following functions within parentheses.</li> </ul> (6 + 3) ² - 8 ÷ 4 x 3 = 9² - 2 x 3 = 81 – 6 = 75 <ul> <li>3/4.  Multiply and/or Divide  X / ÷  – Since these functions have equal weight, they are calculated as third level of operations. When two or more of these functions appear in sequence, they are calculated from left to right.</li> </ul>                                                               2 + 3 x 4 =                                               20 ÷ 4 – 2 x 3 + 8 =                                                             2 + 12 = 14                                           20 ÷ 4 = 5      2 x 3 = 6                                                                                                                              5 – 6 = -1                                                                                                                              -1 + 8 = 7 <ul> <li>5/6.  Add and/or Subtract   + / -  – These functions also carry equal weight, so they are also calculated in sequence from left to right after all other functions have been completed.</li> </ul> 6 – (5 – 3) + 10 =                    4 x 3 – 9 + 3 x 5 =  6 – 2 + 10 =                                12 – 9 + 15 =      4 + 10 = 14                                   3 + 15 = 18 And that, my friends, is the order of operations. While there are no exceptions to the PEMDAS rule, there are, however, two special cases involving exponents that should be mentioned here.  First, when an exponent is included as part of a parenthetical group, the exponent takes precedence over everything else. The second is a little more complicated.  When there is an exponent with its own exponent, the equation is calculated from right to left first, then from left to right. For example, 8²² would be calculated as 8 to the power of 2 squared, not as 8 to the power of 22. In this case, the first step is to calculate the square of 2, which is 4. This gives us the number of times that 8 must be multiplied. Since 8 is also the base number it would be expressed as 8 to the power of 1. From there, PEMDAS kicks in and 8 is multiplied 3 more times, using the sum of the previous calculation as the multiplier.                                                                             1 x 8 = 8              (8 to the power of 1)                                                                          8 x 8 = 64            (8 to the power of 2)                                                                         64 x 8 = 512        (8 to the power of 3)                                                                         512 x 8 = 4,096   (8 to the power of 4)           One final piece of advice. It is the P of PEMDAS (Parentheses) that is your navigational guide along the path of equation calculation. Use it as you would a road map. Reading that map correctly is crucial to reaching your destination successfully. <h3>PEMDAS And You   </h3> Having a problem remembering PEMDAS? A mnemonic, a type of memory aid, may help.  The most commonly used mnemonic for PEMDAS is “Please Excuse My Dear Aunt Sally.” And with that, we’re turning you loose. Now it’s time for you to embark on a PEMDAS journey of your own, so pack up Aunt Sally and hit the road to equation calculation.  Here are a few warm-up exercises to get you started: 3 + 4 x 2 = ?   9, 10, 11, or 14      3 + 3 x 3 – 3 + 3 = ?   18, 12, 3, or 6       6 ÷ 2 x (1 + 2) = ?   9 or 1      48 ÷ 2 x (9 + 3) = ?   2 or 288     OK. Feeling a little more confident? Try these: 25 – 55 + (85 + 65) = ?            6 x (4+15) – [7 x (56 – 19)] = ?            60 ÷ (24 ÷2) x 4² +25 = ? You’re on a roll now. Better get Aunt Sally and your calculator for this trio: 7² + 5 x 8 +6 ÷ 6 – 12 x 2 – (12 – 4) = ?            2² x [14 – (6 + 3)] ÷ 10 + 16 – 2 = ?      and, just for fun,      100 + (34 – (4 + 2) x 3) = ?                                                                                                                                                                                    4 Finally, you’re ready for those Facebook favorites: 7 + 7 ÷ 7 + 7 x 7 – 7 = ?       1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 0 x 1 + 1 = ?        4 x 4 + 4 x 4 – 4 x 4 = ?           7 – 1 x 0 + 3 ÷ 3 = ? <img style="margin: 5px; float: right;" src="http://www.sellyourcalculators.com/im_images/pemdas2.jpg" alt="pemdas sentence" width="250" height="172" />To continue your PEMDAS journey, you’ll need a top notch calculator companion.  If your current calculator is not equipped for road trips like this, check out SellYourCalculators.com. We offer competitive prices for calculators that can’t cover the necessary ground, and our quick turn-around time and outstanding customer service will have you “wowing” the Facebook crowd faster than you can say “Please Excuse My Dear Aunt Sally”. <a href="http://www.sellyourcalculators.com/contact/">Contact us today</a> for more information about <a href="http://www.sellyourcalculators.com/">our calculator buyback program.</a> Reality Math http://www.sellyourcalculators.com/blog/reality-math http://www.sellyourcalculators.com/rss/reality-math Your Calculator Seling Site Sat, 02 Apr 2016 07:23:00 -0500 <h1>Reality Math Is Functional</h1> <img style="margin: 5px; float: left;" src="http://sellyourcalculators.com/im_images/Image_9.jpg" alt="" width="200" height="126" />At some point during our educational experience, we’ve all wondered <a href="http://www.sellyourcalculators.com/blog/why-bother-with-upper-level-math">why the study of math</a> is such a big deal. Surely, we think, we’ll never use this stuff again in our real lives. Math is for teachers and geeks. Real people need just enough math to balance a checkbook, <a href="http://www.sellyourcalculators.com/blog/a-calculator-for-all-reasons">calculate</a> a tip, or determine mileage for a road trip. Nothing, however, could be further from the truth. Math appears everywhere in daily life. Sometimes we just don’t recognize it.  The functional side of Reality Math enables us to determine how far it is from here to there. For example, let’s say you’re traveling and you have to convert miles to kilometers or kilometers to miles?  Reality Math to the rescue.  Since 1 kilometer (km) = 0.62137119 miles and   1 mile (mi) = 1.609344 kilometers, distances in km are always 60% greater than distances in mi. To convert from mi to km, simply multiply the number of miles by 1.6. (50 mi x 1.6 = 80 km) Similarly, distances in miles are always 60% shorter than distances in km. To convert from km to mi, simply multiply the number of km by 0.6. (50 km x 0.6 = 30 mi). Current health guidelines state that an average person can burn approximately 400 calories/day by briskly walking 10,000 steps. Great, but counting steps can be problematic, especially if you lose count and have to start over. Once again, Reality Math saves the day. While the stride of a tall, thin individual will cover considerably more distance than that of a short, stocky individual, the average for calculation purposes is 1 km = 1250 steps and 1 mile = 2,000 steps. To calculate how far 10,000 steps will take you, therefore, simply divide 10,000 by 1250 to get the distance in km (10,000 ÷ 1250 = 8 km) or by 2000 to get the distance in mi (10,000 ÷ 2000 = 5 miles).  <h2>Reality Math Can Be Fascinating</h2> <img style="float: left; margin: 5px;" title="7 wonders of the world" src="http://sellyourcalculators.com/im_images/Image_5.jpg" alt="7 wonders of the world" width="150" height="150" />In our day to day world, Reality Math appears in the most unlikely places. Fibonacci sequences, created by adding two preceding numbers to determine the next number in the sequence (1, 2, 3, 5, 8, etc) can be found throughout nature. From the petals of flowers to the spiral<img style="margin: 5px; float: right;" title="shell" src="http://sellyourcalculators.com/im_images/Image_2.jpg" alt="shell" width="150" height="120" /> chambers of a snail shell to the intricate pattern of a spider web and the branches of a tree, Reality Math bathes the eye in beauty.  Like a majority of people, Reality math loves the number 7. Those in the know believe this is due to the many pleasant images that the number 7 elicits, like the 7 wonders of the world, both old and new, the 7 dwarfs, and the 7 colors of the rainbow. Did you know that it’s possible to cut a cake into 8 pieces using only 3 straight cuts? Reality Math can show you how. Reality Math even uses prime and round numbers to explain the life-cycle of cicadas. These insects incubate underground for periods as long as 13 or 17 years. Biologists believe that this is a survival adaptation designed to minimize contact with predators whose life-cycles are round-numbered.  <h3>Reality Math Can Be Fun</h3> Sometimes Reality Math is just plain fun. Take palindromic numbers for example. These tricky numbers read the same forwards and backwards. For example, if you multiply 111,111,111 x 111,111,111 you get 12,345,678,987,654, 321. More simply, 11x11  (121). Easier still, 1x1(1). Investigate some random Reality Math facts.  You’re sure to be amazed by what you find. Facts like these are just an example of what’s out there: <ul> <li>Adding up the numbers 1-100 consecutively (1+2+3+4+5...) gives you 5050.</li> </ul> <ul> <li>A “jiffy” is actually 1/100th of a second.</li> <li>Count the letters of each word in the following sentence “May I have a large container of coffee” and you have the value of Pi (3.1415926)</li> </ul> <ul> <li>The sum of (6 × 9) + (6 + 9) is... 69. </li> </ul> Reality Math is far more interesting than Classroom Math. Gather up <a href="http://www.sellyourcalculators.com/blog/a-calculator-for-all-reasons">your trusty calculator</a> and give it a try. You just may be surprised at all the fun you’ll have. You may even learn to love Math!  Is your calculator ready for retirement? Don’t miss out on the fun.  Check out <a href="http://www.sellyourcalculators.com/">SellYourCalculators.com</a>. We offer competitive prices for no longer needed calculators. Our quick turn-around time and outstanding customer service will get you back in the calculation game in a “jiffy.”  <a href="http://www.sellyourcalculators.com/contact/">Contact us today</a> for more information about <a href="http://www.sellyourcalculators.com/">our calculator buyback program.</a> When Is Pie Not Pie? When It's Pi! http://www.sellyourcalculators.com/blog/when-is-pie-not-pie-when-its-pi http://www.sellyourcalculators.com/rss/when-is-pie-not-pie-when-its-pi Your Calculator Seling Site Tue, 23 Feb 2016 13:30:00 -0600 <h1>A Not-Exactly-Comprehensive Introduction to Pi</h1> <img style="margin: 5px; float: left;" src="http://sellyourcalculators.com/im_images/Pi-1.png" alt="Pi on pi" width="150" height="149" />Welcome to the mystical world of Pi. What exactly is Pi? Truthfully, there is nothing exact about Pi. In fact, from the <a href="http://www.sellyourcalculators.com/blog/the-language-of-math-to-infinity-and-beyond">hand-calculated efforts</a> of ancient Babylonians to the 21st century age of supercomputers, determining the value of Pi has become a quest rivaling the search for the Holy Grail. Defining the observable universe with a precision of one atom can be achieved with only 39 digits of Pi. Man’s competitive nature, however, compels him to continue the <a href="http://www.sellyourcalculators.com/blog/the-art-of-math">computation </a>into the millions of digits, all to no avail. The infinite mystery of Pi remains intact. The symbol for Pi is the Greek letter π, selected because it stands for perimeter. While the actual value of Pi cannot be determined, an approximate value of 3.14159 (usually shortened to 3.14) has been universally accepted for <a href="http://www.sellyourcalculators.com/blog/why-bother-with-upper-level-math">calculation purposes</a>. The characteristics of Pi seem almost contradictory in nature. Pi is a real number - defined as the ratio of the circumference of a circle to its diameter. Pi is irrational – as a fraction, it is written as 22/7; as a decimal, its value cannot be definitively calculated. Pi is constant - no matter the circle being calculated, Pi is always the same number. Pi is unique – the number of digits to the right of the decimal point are infinite and without any repetitive pattern. Pi is ubiquitous – a major player in Buffton’s Needle Problem (a calculation of the probability that a pin dropped on a set of parallel lines will intersect a line) in both the short needle <img src="http://sellyourcalculators.com/im_images/pi-equation.gif" alt="" width="167" height="36" /> and long needle equations <img src="http://sellyourcalculators.com/im_images/pi.gif" alt="" width="205" height="36" /> , and in the “famous five” equation e^(i*pi) + 1 = 0, connecting the five most important numbers in mathematics, Pi is also alive and well in the real world. <h2>Pi Goes Universal</h2> What Pi is not, is dull. Its mystique seeps out of <a href="http://www.sellyourcalculators.com/blog/deductive-reasoning-in-mathematics">the confines of mathematics</a> to invade our mundane world. Wherever you find circles (our own blue planet or the pupil of an eye, the patterns of the DNA double helix or ripples in a pond, even in the meandering of a river), you’ll find Pi. The symbol π appears as a pass code in the Hitchcock political thriller Torn Curtain. The first six digits of Pi (314159) become the combination to a safe in the Carl Sagan sci-fi novel Contact. Decimal place digits 1 to 78 and 101 to 137 of Pi are sung as lyrics in the song π on the Aerial album by Kate Bush. Even Google got a “slice” of Pi in Sept 2005 by offering exactly 14159265 (the first eight digits after the decimal point) shares of Class A stock. Pi also has its own brand of humor, as demonstrated in the classic math joke “The Second Pizza Theorem.” Question: Using the formula for the volume of a cylinder (V = π r2h) as a model, how would you calculate the volume of a pizza of thickness a and radius z? Answer: Pi z z a Pi even found its way into the Bible, once in 1 Kings 7:23 and again in Chronicles 4:2. In both passages, the dimensions of a large circular vessel, measured in cubits, assign Pi an approximate value of 3. <h3>Pi And Pie and Party Central</h3> Stepping briefly out of “math mode”, Pi becomes quite the party animal in an annual celebration dubbed Pi Day. Held, appropriately, on March 14th (3/14), ideas for Pi Day are nearly as limitless as Pi itself. A few choices to consider include <ul> <li>Main dishes, like shepherd’s pie or chicken pot pie, followed by desserts, like pineapple upside-down cake, π -shaped cookies, or pies with π carved into the crust. </li> <li>Pi-accessorized clothing and jewelry, temporary Pi tattoos, or Pi stickers. </li> <li>A toast to Pi (3.14159) at exactly 1:59 pm, perhaps with an original Pi-em (poem) and a piña colada. </li> <li>Pi games, like a pie-eating contest, or Pi-themed versions of trivia games like Jeopardy </li> <li>A 3.14 mile Pi run ***** ***** </li> </ul> Think you’d like to join the celebration and try your hand at calculating Pi? You’ll need to take a good scientific calculator along as your date to the party. If you already have one but want to upgrade, why not get a last bit of use from your old version by selling it? <a href="http://www.sellyourcalculators.com">SellYourCalculators.com</a> offers competitive prices, quick turn-around time, and outstanding customer service. <a href="http://www.sellyourcalculators.com/contact/">Contact us today</a> for more information on <a href="http://www.sellyourcalculators.com">our calculator buyback program</a>. The Financial Calculator: Your Fine Financial Friend http://www.sellyourcalculators.com/blog/the-financial-calculator-your-fine-financial-friend http://www.sellyourcalculators.com/rss/the-financial-calculator-your-fine-financial-friend Your Calculator Seling Site Fri, 15 Jan 2016 13:16:00 -0600 <h1>Why Should I Invest In A Financial Calculator? </h1> <img style="float: left; margin: 5px;" title="financial calculator" src="http://sellyourcalculators.com/im_images/financial_calculator.jpg" alt="financial calculator" width="250" height="250" />Let me introduce you to the fourth member of the calculator family, the financial calculator. Like its siblings, <a href="http://www.sellyourcalculators.com/blog/a-calculator-for-all-reasons">the basic calculator</a>, <a href="http://www.sellyourcalculators.com/blog/the-graphing-calculator-and-dimensional-thinking">the graphing calculator</a> and the scientific calculator, the purpose of a financial calculator is to do the heavy lifting for you as you journey through the maze of financial calculation. The financial calculator, often called a business calculator, is designed to perform the many mathematical functions necessary to enable business and commerce. “But I have a great scientific calculator,” you say. “Why should I spend more money on a financial calculator when I can perform most financial functions on the calculator I have?” The answer is SPEED!  Using your scientific calculator may get you to the same destination, but the business algorithms built into a financial calculator can cover the distance with lightening speed. This ability to calculate quickly can make the difference between successfully crossing the finish line and being left at the starting gate. <h2>What Can A Financial Calculator Do For Me?</h2> Think about the edge you’ll have with a financial calculator to crunch numbers for you. Life in the 21st<img style="float: right; margin: 5px;" title="TI-83 Financial Calculator" src="http://sellyourcalculators.com/im_images/ti83_financial_calculator.jpg" alt="TI-83 Financial Calculator" width="110" height="246" /> century is incredibly fast-paced. Success can be gained or lost in the blink of an eye. Don’t miss out on the opportunity of a lifetime because you’re slow coming up with answers to financial questions. Now that I’ve got your attention, let’s take a look at how to make the most of your partner in financial calculation. The speed of the financial calculator comes from pre-set, stand-alone keys that make many financial calculations and functions available at the click of a button. Many are also programmable, allowing you to customize your device to meet your specific needs. Like all other electronic devices, the financial calculator needs good input to produce good data. The old Computer Programmer adage, “garbage in, garbage out,” is also true of the financial calculator. These amazing mathematical aids are fast, but DUMB. They rely on us for their information, so attention to detail is imperative. Given accurate information, a financial calculator can easily calculate any of the parameters of future value (FV), number of compounding periods (N), interest rate (I/Y), annuity payment (PMT), and starting investment. A few examples of these defining parameters are:             Real Estate calculation, including:  mortgage calculation, amortization, mortgage payoff,                       lease calculation, and refinance.             Loan calculation, including:  personal and auto loan calculation, interest, and payments.             Investment calculation, including:  inflation, currency conversions, and compound                                interest calculation.             Personal calculation, including:  budget calculation, take-home pay, income tax, and                             retirement. <h3>How Do I Choose The Right Financial Calculator?</h3> <img style="float: left; margin: 5px;" title="financials" src="http://sellyourcalculators.com/im_images/financials.jpg" alt="financials" width="250" height="131" />So, I’ve convinced you that owning a financial calculator is a good idea. The next question is which one is right for you?  That depends. First of all, why do you need a financial calculator? If you are taking a few finance courses, for example, you can get by with a less expensive model than if you are working as a professional in the financial arena. Secondly, how much do you want to spend? If you are simply trying to pass those finance courses, both the Hewlett Packard HP bll + or the <a href="http://www.sellyourcalculators.com/">Texas Instruments TI BA ll Plus</a> will do the job admirably for under $35. If, however, business finance is your career choice, do a little research before you buy. Getting all that you need in a quality financial calculator may be more expensive, but the return on investment is well worth the initial cost. If you see a financial calculator in your future, <a href="http://www.sellyourcalculators.com/">why not trade in any calculators</a> that you no longer need or use to reduce the cost of your purchase. We are a premier buyback destination for used calculators offering stellar customer service, quick turn-around time, and competitive pricing. <a href="http://www.sellyourcalculators.com/contact/">Contact us today</a> for more information on <a href="http://www.sellyourcalculators.com/">our calculator buyback program.</a> The Graphing Calculator And Dimensional Thinking http://www.sellyourcalculators.com/blog/the-graphing-calculator-and-dimensional-thinking http://www.sellyourcalculators.com/rss/the-graphing-calculator-and-dimensional-thinking Your Calculator Seling Site Mon, 23 Nov 2015 23:20:00 -0600 <h1>The Graphing Calculator And One-Dimensional Thinking</h1> A <a href="http://www.sellyourcalculators.com/blog/the-graphing-calculator-from-pre-history-to-pre-calculus-and-beyond">graphing calculator</a> requires the application of understanding to a concept in order to use that concept effectively. This enables the user to solve problems by visualizing them. While the use of the <a href="http://www.sellyourcalculators.com/blog/the-graphing-calculator-from-pre-history-to-pre-calculus-and-beyond">graphing calculator</a> is primarily in the fields of math and science, changing the dimension of a given graph can be a pleasant diversion from the mundane.  One of the most familiar types of graph is the one-dimensional, real number line graph. With this type of graph each point on the line corresponds to a real number.  The arrow on the end of this example indicates the direction in which the numbers get larger. <img style="float: left; margin: 5px;" src="http://www.sellyourcalculators.com/im_images/one-dimensional.jpg" alt="" width="363" height="51" /> Most commonly used graphs have the increase going to the right. With a little imagination and the appropriate equation, however, one can use a graphing calculator to turn an “ugly duckling” one-dimensional line graph into a beautiful “swan.” <img style="float: left; margin: 5px;" src="http://www.sellyourcalculators.com/im_images/swan.jpg" alt="swan graph" width="132" height="110" /> <h2>The Graphing Calculator And Two-Dimensional Thinking</h2> <a href="http://www.sellyourcalculators.com/blog/the-graphing-calculator-from-pre-history-to-pre-calculus-and-beyond">Using a graphing calculator</a> to create a two-dimensional rectangular graph involves creating two sets of real number lines placed perpendicular to each other. As in the one-dimensional graph, each line in this example has an arrow indicating the direction of increase.  <img style="float: right; margin: 5px;" src="http://www.sellyourcalculators.com/im_images/2-dimensional.jpg" alt="2D graph" width="247" height="89" /> These coordinates (the Cartesian coordinates) of the two-dimensional graph are also labeled, with the x-axis being the horizontal line and the y-axis being the vertical line. To define the point, start at the origin (the junction of the two axes). Move the x units horizontally, follow by the y units vertically. Two-dimensional graphing also includes polar coordinates and inequalities. Polar coordinates begin at the origin and go straight out to the point. Once the point is reached, the angle with the positive x axis is determined. The distance from the point of origin and the amount of rotation from the positive x axis then become the coordinates of the point (A).    <img style="float: left; margin: 5px;" src="http://www.sellyourcalculators.com/im_images/A.jpg" alt="2D Graph" width="201" height="129" /><img style="float: left; margin: 5px;" src="http://www.sellyourcalculators.com/im_images/B.jpg" alt="2D Graph 2" width="145" height="129" /><img style="float: left; margin: 5px;" src="http://www.sellyourcalculators.com/im_images/C.jpg" alt="2D Graph 3" width="142" height="129" /><img style="float: left; margin: 5px;" src="http://www.sellyourcalculators.com/im_images/D.jpg" alt="2D Graph 4" width="107" height="110" />   The r value can be both positive and negative (B). Using the equation r = 1, a circle is formed (C). Inequalities consist of variables, which when calculated, produce coordinates that are unequal in distance from the origin (D). What all this means is that an inquisitive mind with a good graphing calculator can produce some interesting two-dimensional variations on the circle.     <img style="margin: 5px; float: left;" src="http://www.sellyourcalculators.com/im_images/heart.jpg" alt="heart graph" width="156" height="138" /><img style="float: left; margin: 5px;" src="http://www.sellyourcalculators.com/im_images/spiral.jpg" alt="spiral graph" width="147" height="148" />            <h3>The Graphing Calculator And Three-Dimensional Thinking </h3> Going from flat (1D and 2D) to fluffy (3 D) requires some <a href="http://www.sellyourcalculators.com/blog/the-language-of-math-to-infinity-and-beyond">out-of-the-box thinking</a> and a graphing calculator that has three-dimensional capability. Those in the know recommend the Texas Instruments <a href="http://www.sellyourcalculators.com/blog/back-to-school-calculators-for-discerning-students-and-their-frugal-parents">TI-83, TI-89, TI-92, and TI-Nspire models,</a> or the Voyage 200 graphing calculator. A three-dimensional graph represents one of two perspectives; it is either the graph of a function of two variables f(x, y) or the relationship among three variables g(x, y, z). For example: the TI-89, TI-92, or the Voyage 200 graphing calculators would present the equation: z=y^2-x^2 as this three-dimensional graph. <img style="float: left; margin: 5px;" src="http://www.sellyourcalculators.com/im_images/3D.jpg" alt="3D graph" width="164" height="104" /> If the coordinates are real numbers, the graph can be represented as planar or curved.<img style="float: right; margin: 5px;" src="http://www.sellyourcalculators.com/im_images/3D-color.jpg" alt="3D color graph" width="225" height="100" />     Three-dimensional graphs are usually drawn on a two-dimensional screen using perspective methods to create the three-dimensional effect. Colors on the graph are variable and can be applied based upon the design. Transparency and resolution are also customizable. Another avenue to explore is the ability to graph multiple three-dimensional graphs on the same axes. The best option is to approach three-dimensional graphing with a creative spirit, an open mind, and a top-notch graphing calculator. If you do, you’ll find the possibilities are endless. <img style="float: left; margin: 5px;" src="http://www.sellyourcalculators.com/im_images/waves.jpg" alt="wave graph" width="133" height="100" /><img style="margin: 5px; float: left;" src="http://www.sellyourcalculators.com/im_images/swale.jpg" alt="3D graph" width="160" height="100" /><img style="margin: 5px; float: left;" src="http://www.sellyourcalculators.com/im_images/doughnut.jpg" alt="doughnut graph" width="117" height="100" /> Ready for dimensional travel but don’t have the vehicle you need. SellYourCalculators.com can make an upgrade to a great graphing calculator as easy as 1, 2, 3. We are a premier buyback destination for used calculators. Our stellar customer service, quick turn around time, and competitive pricing will help make the purchase of a new graphing calculator less pain in the pocket. Contact us today for more information on <a href="http://www.sellyourcalculators.com/">our graphing calculator buyback program</a>. The Language of Math - To Infinity And Beyond http://www.sellyourcalculators.com/blog/the-language-of-math-to-infinity-and-beyond http://www.sellyourcalculators.com/rss/the-language-of-math-to-infinity-and-beyond Your Calculator Seling Site Thu, 05 Nov 2015 04:28:00 -0600 <h1>The Language of Math - Begining With The Basics</h1> <img style="float: left; margin: 10px;" src="https://lh6.googleusercontent.com/wmRIBZLEJNodwy9lNjr6NzVhJqPv3Yo6h86yLV6z7JMwDxQkz0DDV78akylJ7QYq2mLHaOaAgoCRWjxNDmeY40RNpJzM6l67eRyxXKe55B4G74EVfq4K53lvCgZFjp5-ffg4hA_P2wzdhQGZ" alt="complex math problems" width="116px;" height="67px;" />When most of us think of <a title="Keep your math skills sharp" href="http://www.sellyourcalculators.com/blog/keep-your-math-skills-sharp-this-summer" target="_blank">math</a>, we see it merely as numbers and numbers and more numbers. If you can look beyond the obvious, however, math takes on a whole new personality. Open your mind and discover the language of math.  The renowned 16th century Italian mathematician, Galileo, understood that the symbols of mathematical calculation were really a form of communication. In fact, he once referred to mathematics as “the language with which God wrote the Universe”.  Like the hieroglyphics of antiquity or the character language of the orient, the language of math is a truly unique dialect comprised of formulas and nuances, all governed by specific rules. As with the rules governing written sentence structure… <img style="float: left; margin: 10px;" src="https://lh3.googleusercontent.com/mC1XoUkWJeoGa60_EIy-uNR09KzNANERg1ZNrZNjB7avV41KfpZWeamE6j6UCSSIOW916sSfQOh55KX4GpErVGSpYCt8wiEcANoP4s41TK7VQQ0YcppG9TGBS1Qxp3OPNB-H2EvXbMZU_0P9" alt="most complex math problems" width="200" height="71" />Simple or Complex… the basic rules governing <a title="Keep your math skills sharp" href="http://www.sellyourcalculators.com/blog/keep-your-math-skills-sharp-this-summer" target="_blank">the computation of mathematical sentence structure</a> remain the same. 1. Perform any calculations within parentheses  2. Factor in exponents. Then, working from left to right 3. Perform all multiplication 4. Perform all division<img style="float: right; margin: 10px;" src="https://lh5.googleusercontent.com/-Wfdo2viLqIw51P6FjisdqtLsHZnEv8n2lhpZ7ogCo2EisHoSNUc1-LeIK4vo58IrvVNocl0xAlCeTEx5qHY51OMXEF6ZhKGk7CubAMzo7VkbzIJX7ala7zthJMOMACNkmMdY871R-bhGhxk" alt="basic rules of math" width="200" height="93" /> 5. Perform all addition 6. Change subtraction to addition, take the opposite sign of the next number and add <h2>The Language of Math - Deciphering The Symbols</h2> <img style="float: left; margin: 10px;" src="https://lh5.googleusercontent.com/qYSARtQEW4pTC3BXUtaSGHQxwzA2iC4oZBBtTVjrL0cp6852lJtL66YfHHdM8tSfUcM2h7BxizFRk1kHv8YpNFlEeXDUeKmI42wLgkfzC21ZWWaG95AmsIMtId8kIS7SOISpBSm02L-pjADc" alt="upper level mathematical symbols" width="96px;" height="96px;" />Like the nouns and verbs of the written word, symbols are the glue that hold the language of math  together. Just as learning to read begins with learning the letters of the alphabet, learning the language of math begins with learning its “alphabet” of symbols. Easiest to learn are the basic symbols which are generally introduced early in the student’s schooling.  <ul> <li>The plus sign + , which means “more,” and denotes addition</li> <li>The minus sign –, which means “less,” and is used in subtraction </li> <li>The multiplication sign ×, which indicates how many times a given number is to be </li> <li>The division sign ÷, also called the obelus, which indicates the number of times one </li> <li>The equals sign =, which means “is” or “is the same value as.”</li> </ul> As the student of language progresses, more complex words are added to give greater substance to sentence structure. <a href="http://www.sellyourcalculators.com/blog/why-bother-with-upper-level-math" target="_blank">As proficiency in the language of math increases</a>, the student begins to use symbols that allow for more in-depth calculation.  <ul> <li>The percent sign % , used to determine portions of a whole </li> <li>Strict inequality signs <  > , designating “greater than” and “lesser than” </li> <li>Parentheses (…) , for precedence grouping </li> <li>The prime symbol  x′, for derivative </li> <li>The superscript notation xy , for exponentiation </li> <li>The radical symbols √ and n√, for square root and nth root</li> </ul> Once the student becomes fluent in the language of math, symbols emerge that enable the computation of more abstract mathematical concepts.  <ul> <li>The integral sign  ∫ </li> <li>The summation symbol  ∑ </li> <li>The partial differential sign  ∂ </li> <li>The differential sign  d </li> <li>The proportionality sign  &prop; </li> <li>The aleph symbol  &alefsym; </li> <li>The nabla symbol ∇ </li> <li>The infinity sign ∞ </li> </ul> <h3>The Language of Math - Discovering A World Of Possibilities</h3> <img style="float: left; margin: 5px;" src="https://lh3.googleusercontent.com/cL7_iaKBIA6X8M0l0o9l9J4AbzU7n-po5b4nJYWHlW3lI3OzyX4XxG1Z7BHGe8S_sO745MXuh8KvrtQYojTPpWtIFvd8FsshShcLtOp1m3jH3e159eYkpOgS7mmL76JcHm9Ixyo3eyVMwbuq" alt="scientific calculators" width="142px;" height="96px;" />If the language of math intrigues you, make the leap. The translation process will take you where you’ve never gone before. Don’t let the finite limits of conventional language hold you back. Infinity awaits. World famous mathematician, Albert Einstein, was a mediocre student, but his mastery of the language of math still stands as model of visionary greatness. Learning any language is a challenge. Using an aid, like a disc or an app, will help speed the process. The same principle applies to the language of math. The best tool in your arsenal of computation aids is a good scientific calculator.  If you currently have a functional scientific calculator but need to upgrade, look to SellYourCalculators.com for help. We are a premier buyback destination offering competitive prices for used calculators. Let us help defray the cost of a new, high quality scientific calculator than can launch you on the path to infinity and beyond. <a href="http://www.sellyourcalculators.com/" target="_blank">Contact us today</a> for more information. The Art Of Math http://www.sellyourcalculators.com/blog/the-art-of-math http://www.sellyourcalculators.com/rss/the-art-of-math Your Calculator Seling Site Fri, 18 Sep 2015 05:47:00 -0500 <h1>The Art of Math In The Simple Beauty of Calculation</h1> When it comes to <a href="http://www.sellyourcalculators.com/blog/why-bother-with-upper-level-math">math</a>, there is no middle ground. There are those that absolutely love the cerebral challenge of mathematics. There are others who see math as an evil plot, mandated by a sinister educational system, designed to torture a captive audience of unfortunate students who are merely trying to get through school. We are about to present both groups with a different perspective, one that may change the way they look at math forever. Math as art. Who knew? The artistic quality of mathematics lies in its logic.  The simple beauty of calculation is a perfect example. <a href="http://www.sellyourcalculators.com/blog/keep-your-math-skills-sharp-this-summer">Calculation</a> is the deliberate process of transforming input into results. <img style="margin: 1px 5px;" src="http://www.sellyourcalculators.com/im_images/computation.jpg" alt="computation" width="250" height="111" />                                  The conceptual balance of arithmetical calculation creates a numerical work of art that is similar in context to DaVinci’s “Last Supper” or the architechtural symmetry of the Taj Mahal of India. <img style="float: left; margin: 1px 5px;" title="Davinci Last Supper" src="http://www.sellyourcalculators.com/im_images/davinci-last-supper.jpg" alt="Davinci Last Supper" width="200" height="113" /><img style="margin: 1px 5px; vertical-align: text-bottom;" title="Taj Mahal" src="http://www.sellyourcalculators.com/im_images/taj-mahal.jpg" alt="Taj Mahal" width="250" height="142" /> The Art of Math In Modern Computation <a href="http://www.sellyourcalculators.com/blog/keep-your-math-skills-sharp-this-summer">The mastery of calculation</a> is a prerequisite for our next mathematical art form, computation. Computation is a systematic application of specific rules (like an algorithm or a protocol), through a process of loops or repetitions, to reach a valid conclusion. This complex format can best be described as using mathematics and/or logic to answer questions derived from complex data sets. Computation can be done manually on piece of paper using a pencil and some brain power, or by entering the appropriate data into a computer.  Anyone who has ever struggled in math class with problems like <img style="float: left; margin: 1px 5px;" title="LCD computation" src="http://www.sellyourcalculators.com/im_images/fractions.jpg" alt="LCD computation" width="141" height="127" /><img style="margin: 1px 5px; vertical-align: text-bottom;" title="sequence computation" src="http://www.sellyourcalculators.com/im_images/sequence.jpg" alt="sequence" width="229" height="146" /> <div> understands just how much “fun” mathematical computation can be.  <div> Let’s soften the lines of text and numbers and look at computation from an artistic point of view. Think of computation as the modern art of the mathematics world. Instead of tedious problems to be mastered, picture it as the loops and lines of a Van Gogh painting or the repetitious style of the portrait art by Andy Warhol. <img style="float: left; margin: 1px 5px;" title="Van Gogh" src="http://www.sellyourcalculators.com/im_images/vangogh.jpg" alt="Van Gogh" width="208" height="167" /><img style="margin: 1px 5px; vertical-align: text-bottom;" title="Andy Warhol" src="http://www.sellyourcalculators.com/im_images/Andy-Warhol.jpg" alt="Andy Warhol" width="200" height="167" /> The Art of Math In The Ethereal Quality of Estimation The final entry in our math as art presentation is estimation. This format takes mathematics into the realm of speculation. Defined as the approximation of the value, number, quantity, or extent of a given item, estimation is, basically, “guessing with math.” Estimation produces a speculative answer even if the input information is incomplete. Although the answer is not definitive, it is considered valid because it is based upon the best information available. The use of estimation in real-world scenarios includes fields as diverse as political polling and fantasy football. It is the mathematical assessment of would-be, could-be, should-be actuality. In math class, estimation looks like this  <img style="margin: 1px 5px; vertical-align: text-bottom;" title="estimation" src="http://www.sellyourcalculators.com/im_images/estimation-1.jpg" alt="estimation" width="250" height="166" /><img style="float: left; margin: 1px 5px;" title="estimation problem" src="http://www.sellyourcalculators.com/im_images/estimation-2.jpg" alt="estimation problem" width="250" height="127" /> From an artistic perspective, however, estimation takes on an ethereal quality. A shadowy concept without definitive substance, much like the naturalistic paintings of famed ethereal artist, Jane Wilson. <img style="float: left; margin: 1px 5px;" title="Jane Wilson painting" src="http://www.sellyourcalculators.com/im_images/jane-wilson-1.jpg" alt="Jane Wilson painting" width="231" height="196" /><img style="margin: 1px 5px; vertical-align: text-bottom;" title="Jane Wilson painting 2" src="http://www.sellyourcalculators.com/im_images/jane-wilson-2.jpg" alt="Jane Wilson painting 2" width="226" height="196" /> Our presentation is complete. Are you intrigued enough to approach math from this unique perspective? If so, be sure to take your old friend, <a href="http://www.sellyourcalculators.com/blog/the-graphing-calculator-from-pre-history-to-pre-calculus-and-beyond">the calculator</a>, along for the ride. It will make the trip to solutions much easier. If a new calculator is in the game plan, <a href="http://www.sellyourcalculators.com/">check out the buyback program at SellYourCalculators.com</a>. We offer competitive prices for your retirement-bound model, giving you a cushion against the cost of your new and improved replacement. <a href="http://www.sellyourcalculators.com/">Contact us today</a> for more information. </div> </div> Back to school calculators for discerning students and their frugal parents. http://www.sellyourcalculators.com/blog/back-to-school-calculators-for-discerning-students-and-their-frugal-parents http://www.sellyourcalculators.com/rss/back-to-school-calculators-for-discerning-students-and-their-frugal-parents Your Calculator Seling Site Mon, 17 Aug 2015 14:17:00 -0500 <h1>A Calculator For The Middle School Student</h1> There has been much discussion about the use of <a href="http://www.sellyourcalculators.com/">calculators</a> at the elementary level. Some say calculator use in the lower grades inhibits the learning of basic math concepts. Others hold that using a calculator helps young students concentrate on understanding math concepts by reducing the time spent manually working on tedious calculations. While a calculator may be optional for students in elementary school, by middle school it will become as much a part of back to school basics as notebooks and backpacks. <a href="http://www.sellyourcalculators.com/blog/choosing-the-right-graphing-calculator">Choosing an appropriate calculator</a> for the middle school student is based upon functions and finances. Most students at this level need a relatively simple calculator that offers basic math functions. If the calculator will only be used during middle school, there are several good options available. The TI-73 from Texas Instruments is intended for middle school students. It performs basic arithmetic and graphing functions and cost is nominal. Another inexpensive calculator for this age group is the Casio fx-55 PLUS elementary/middle school fraction calculator. <a href="http://www.sellyourcalculators.com/blog/top-3-graphing-calculators">Hewlett-Packard, Sharp, and Cannon</a> also offer modestly priced calculators that will adequately meet the requirements of the middle school student. <h2>The High School Student’s Calculator</h2> High school signals a major change for students. At this level, an <a href="http://www.sellyourcalculators.com/blog/a-calculator-for-all-reasons">advanced scientific calculator</a> is mandatory. Although some states still only require 3 years of math to graduate, most states and many colleges and universities now have a 4 year requirement that includes a minimum 2 years of algebra and 1 year of geometry. If admission to college is the goal, “strongly recommended” courses should be part of the high school student’s curriculum. Math courses range from Elementary Algebra and Algebra I as a freshman to calculus, trigonometry, statics, and probability by the senior year. High school teachers offer recommendations on specific models of calculators that the student will need to successfully complete course requirements. Since cost now becomes a factor, multi-year use is another important consideration. If the student already has a <a href="http://www.sellyourcalculators.com/blog/using-the-ti-83-plus-calculator">TI-83 Plus</a> or <a href="http://www.sellyourcalculators.com/blog/the-ti-84-plus-graphing-calculator-its-still-the-one">TI-84 Plus</a>, trading up to a more expensive calculator is really not necessary. Both these calculators are capable of performing all but the highest mathematical functions and both are accepted by <a href="http://sellyourcalculators.com/blog/using-graphing-calculators-on-the-sat-act">the ACT and the SAT</a>. If an upgrade is in the cards, the TI-Inspire (non CAS), HP 48G (with the infrared port covered), and Casio FXCG10 Prizm are also allowed for ACT-SAT testing. <h3>The College and Beyond Calculator</h3> You’ve made it! High school graduation is behind you and you’re on your way. Moving up to college brings with it a whole new spectrum of calculator requirements. A must-have for college students studying <a href="http://sellyourcalculators.com/blog/why-bother-with-upper-level-math">math, physics, chemistry, astronomy, engineering, or architecture</a> is a good scientific calculator. Basic scientific calculator functions include scientific notation, logarithmic and trigonometric functions, exponentials, and roots beyond the square root. More advanced models also perform many of the functions common to graphing calculators like hexadecimal, binary, and octal calculations, complex numbers, statistics and probability functions, matrix calculations, physical constants, and calculus. Texas Instruments, Hewlett-Packard, Casio, Canon, and Sharp are the most popular brands of scientific calculators. In addition to versatility, recent models from all now feature dot matrix displays. For many college students and business professionals, a graphing calculator is the better choice. In addition to the functions noted for the scientific calculator, a graphing calculator is able to plot graphs, solve simultaneous equations, and perform other tasks with variables. The best graphing calculators are also programmable, allowing customization of applications. Some come equipped with CAS (Computer Algebra System), which enables manipulation of algebraic expressions and exact form answers without numerical approximations. Top choices in this area are the HP 50G, <a href="http://sellyourcalculators.com/blog/ti-nspire-tips-and-tricks">TI-Nspire CAS</a>, the TI-89, and the Casio ClassPad. Graphing calculators are also versatile enough to move from the educational setting to business applications to gaming with ease. If your supply list for this school year includes a new calculator, check us out at <a href="http://stores.ebay.com/CalcSwap">www.CalcSwap.co</a>m. If you’ve got a graphing calculator already and want to get cash back, <a href="http://www.sellyourcalculators.com/">www.SellYourCalculators.com</a> offers competitive buy back prices for your current model, giving you a cushion against the cost of your upgrade. <a href="http://www.sellyourcalculators.com/">Contact us today</a> for more information.   The TI-84 Plus Graphing Calculator - Its Still The One http://www.sellyourcalculators.com/blog/the-ti-84-plus-graphing-calculator-its-still-the-one http://www.sellyourcalculators.com/rss/the-ti-84-plus-graphing-calculator-its-still-the-one Your Calculator Seling Site Sat, 11 Jul 2015 17:50:00 -0500 <h1>And The Survey Says…The TI-84 Plus Graphing Calculator</h1> <a href="http://www.sellyourcalculators.com/blog/the-graphing-calculator-from-pre-history-to-pre-calculus-and-beyond"><img style="margin: 5px; float: left;" src="http://www.sellyourcalculators.com/im_images/TI-84_Plus.jpg" alt="TI-84 Plus" width="200" height="149" />Graphing calculators</a> give high school and college students the ability to visualize abstract mathematical and scientific concepts. If a picture is worth a thousand words, these handheld little powerhouses are the art department of the numbers game. All <a href="http://www.sellyourcalculators.com/blog/top-3-graphing-calculators">graphing calculators</a>, however, are not created equal. How do you go about choosing the best graphing calculator to meet your needs? Check the top choices of those who use and evaluate the devices. In a July 2015  <a href="http://www.sellyourcalculators.com/blog/top-3-graphing-calculators">comparison study of graphing calculators</a> conducted by Best Reviews, the TI-84 Plus, from Texas Instruments, was selected best of the best. Since its original release in 2004, this reliable graphing calculator has consistently received top ratings for performance and versatility. A separate assessment of overall customer satisfaction revealed that 99% (269 of 273) of those surveyed would recommend the TI-84 Plus to a friend. <h2>Up Close And Personal With The TI-84 Plus Graphing Calculator</h2> The experts rely upon four areas of interest when <a href="http://www.sellyourcalculators.com/blog/top-3-graphing-calculators">choosing a graphing calculator</a>: Features, Durability/Longevity, Ease of Use, and Support/Warranty. Let’s take a look at what the TI-84 Plus has to offer. <ul> <li>Features – a walk on the technical side of the TI-84 Plus graphing calculator reveals an impressive array of features.</li> </ul>             24 KB (48 KB on newer models) available RAM             480 KB available Flash ROM             8 line x16 character (normal font) text display             160 x120 pixels, monochrome LCD graphics display             Algebraic or Infix input method             Horizontal and vertical split screen graph and table display             USB on-the-go technology for file sharing and PC Connection             13 pre-loaded apps including, Cabri® Jr., Vernier EasyData™, and StudyCards <ul> <li>Durability/Longevity – A graphing calculator worth the investment must be tough enough to survive being dropped on the floor or smashed in a heavy backpack. It must also be versatile enough to remain relevant for more than one or two school years. Finally, it must be compatible with requirements for tests like the SAT, ACT, and AP. </li> </ul> Given a 10/10 rating for durability, the sturdy TI-84 Plus graphing calculator is also versatile enough to go the distance from basic high school math through advanced college courses. In fact, the interface of the TI-84 Plus has become the standard for textbook instruction on calculator use and teachers at all levels customize their classes around this specific graphing calculator. A small sample of the many on-board functions that help make the TI-84 Plus the graphing calculator of choice are: Calculus, trigonomic, engineering, and financial functions Advanced statistics features including 9 hypothesis testing functions, 6 confidence interval functions, and 1-way analysis of variance Real and complex numbers calculated to 14-digit accuracy and displayed with 10 digits plus a 2-digit exponent Upgrade capability In addition, the TI-84 Plus graphing calculator has widespread acceptance and use in schools and on major tests. <ul> <li>Ease of use – one of the most defining factors in the choice of a graphing calculator. If a student requires the user’s manual for every function, the complex device will die of neglect as another, more user friendly version becomes a daily companion. The TI-84 Plus graphing calculator is exceptionally easy to use.  A few early trips to the user manual are all that is necessary to achieve proficiency. Ease of Use features of the TI-84 Plus include:</li> </ul> Clear and intuitive button layout Basic functions like exponents and multiplication located on physical buttons Easy to find pull-down menus for access to advanced functions Additional functions, accessed by the 2nd and Alpha keys, are clearly labeled, easy to read, and located directly above the corresponding key Capability to define, save, graph, and analyze up to 10 graphing functions at one time Numeric evaluations presented in table format for all graphing functions User-defined list names with storage capacity for up to 999 elements Compatibility with TI presentation tools for in-class collaboration <ul> <li>Support and Warranty – the icing on the customer service cake. Texas Instruments, birthplace of the TI-84 Plus graphing calculator, offers unprecedented customer service. Answers to questions from calculator settings and apps to troubleshooting and tools for parents can be found in their user-friendly online FAQ section, the Self-Service Knowledge Base. Another helpful feature is the “User Groups” function, created by educational professionals to share information and instruction on the use of TI technology in various settings. Also available are online chat, a software service center, product tutorials, and up to date product manuals and getting started guides. Want to talk to someone that understands your TI-84 Plus? The TI website also provides phone numbers for both general and technical questions. A standard one year limited warranty, included with TI-84 Plus, guarantees the quality of the calculator and covers any defects in manufacture or materials. The limited warranty does not cover user-inflicted damage, but the durability of this tough little graphing calculator usually makes this a moot point.  </li> </ul> <h3>The TI-84 Plus – A Graphing Calculator For The Long Haul</h3> If what you’re looking for is a tough, well equipped graphing calculator that will see you through high school and college, then the TI-84 Plus is the one for you. The latest TI-84 Plus OS offers many free update features including a MathPrint™ download, new Stat Wizards for selected commands and functions, the ability to input and view math symbols and formulas exactly as they appear in textbooks, and the choice to view calculations as decimals or fractions, just to name a few. Throw in an impact-resistant slide case and a colorful Guerrilla cover and you’ve got a real deal. When you’re ready for the TI-84 Plus graphing calculator, check us out at <a href="http://www.calcswap.com/">CalcSwap.com</a>. If you’ve got an old calculator that you’d like to replace with the TI-84 Plus, we are a <a href="http://www.sellyourcalculators.com/">premier buy back</a> location for no longer needed calculators. We will be happy to give your old calculator a new home. <a href="http://www.sellyourcalculators.com/contact/">Contact us today</a> for more information. <ul> </ul> A Calculator For All Reasons http://www.sellyourcalculators.com/blog/a-calculator-for-all-reasons http://www.sellyourcalculators.com/rss/a-calculator-for-all-reasons Your Calculator Seling Site Wed, 17 Jun 2015 09:46:00 -0500 <h1>The Small But Mighty Calculator</h1> Calculator - a small, portable electronic device used to perform mathematical functions. Many believe <a href="http://www.sellyourcalculators.com/blog/the-graphing-calculator-from-pre-history-to-pre-calculus-and-beyond">the calculator is a modern invention</a>, but that is far from true. In fact, today’s versatile, hand-held calculator is the descendant of a long line of counting devices. From the abacus, developed over 2000 years ago, to the mechanical calculator of the 17th century, to the modern push button devices of today, the calculator has been an invaluable companion in our quest for mathematical excellence. Throughout history, the ability to add and subtract quickly and accurately has governed our interactions in the marketplace. If, as they say, necessity is the mother of invention, the progression from primitive counting devices to today’s job-specific, pocket sized mathematical powerhouse was an inevitable evolution. The incredible speed of the calculator is the result of intricate electrical interaction. The integrated circuitry of every calculator consists of sensors which send and transistors which receive electrical impulses when the buttons are pressed. This input is deciphered as binary, a “language” of 0’s and 1’s. Once the calculator formulates an answer, binary turns on a series of lines or pixels to create decimal (base 10), which produces visual numbers that we can recognize. <h2>A Calculator For All Reasons</h2> In our tech savvy world, purpose dictates programming. Although the basic operational principles for all calculators are the same, specific tasks require specialized functions. <a href="http://www.sellyourcalculators.com/blog/top-3-graphing-calculators">Modern calculators</a> are now defined by their use in fields as diverse as science, business, and academia. A basic keypad calculator is used for simple math, like addition, subtraction, multiplication, and division. Limited memory functions are also available on the basic model.  The scientific calculator, a modern version of the slide rule, is designed to calculate the complex scientific formulas of chemistry and physics. It is also a valuable tool in areas of advanced mathematics like trigonometric logarithms and exponential equations. These calculators are programmable and some have the capability to transfer data from one calculator to another. <a href="http://www.sellyourcalculators.com/blog/top-3-graphing-calculators">Graphing calculators</a> are typically used in the fields of science, engineering, and education. They are especially useful in situations involving variables, like graph plotting and simultaneous equations. In a laboratory setting, graphing calculators can be attached to sensitive instruments, like electric thermometers and light meters, to monitor and log data. <a href="http://www.sellyourcalculators.com/blog/the-graphing-calculator-from-pre-history-to-pre-calculus-and-beyond">Graphing calculators</a> are exceptionally user friendly and are easily programmable for gaming purposes. Many offer color displays and feature animated, interactive 2D and 3D drawing capability for functions like math plotting. Financial calculators, also called business calculators, are designed with stand alone keys specific to commercial finance. These calculators are used in the preparation of mortgage, auto, and personal loans. They are also widely used in determining investment, retirement, and tax projections. <h3>Calculator Conclusions</h3> It’s been over half a century since the introduction of the first all-electronic desktop calculator in 1962 and calculators remain an invaluable aide in the determination of mathematical conclusions.  In fact, the ability to calculate is so important that even today’s most advanced computers, PDAs (personal data assistants), and <a href="http://sellyoursmartphones.com/">smartphones</a> are often equipped with calculator utility programs. <a href="http://www.sellyourcalculators.com/blog/top-3-graphing-calculators">Modern calculators</a> have become smaller, smarter, and more diverse. The future will surely demand accurate, job specific, mathematical solutions. The versatile calculator will continue to evolve to meet that challenge. At <a href="http://stores.ebay.com/CalcSwap" target="_blank">CalcSwap</a>,our mission is to provide you with <a href="http://stores.ebay.com/CalcSwap">top quality new or used  calculators</a> designed to meet your needs and priced to fit your budget.  If it’s time to move up to something more advanced, <a href="http://www.sellyourcalculators.com/">SellYourCalculators.com</a> pays competitive prices to <a href="http://www.sellyourcalculators.com/">buy back calculators</a> that have served their purpose. <a href="http://www.sellyourcalculators.com/contact/">Contact us</a> today for more information about <a href="http://www.sellyourcalculators.com/faq/">our user-friendly buy and sell process</a>. Deductive Reasoning in Mathematics http://www.sellyourcalculators.com/blog/deductive-reasoning-in-mathematics http://www.sellyourcalculators.com/rss/deductive-reasoning-in-mathematics Your Calculator Seling Site Fri, 22 May 2015 17:25:00 -0500 <h1>Deductive Reasoning – Mind v Math</h1> Deductive reasoning - the process of determining a logical conclusion from a specific set of data.  Such a simple concept. So simple, in fact, that for generations deductive reasoning was believed to be an inherent trait of the human mind. Children are naturally curious. They learn by exploring their world. Both success and failure teach them that certain actions have certain consequences. Early deductive reasoning re-enforces the obvious. “Mother provides food. I am hungry. If I go to mother, I will get food.” Unfortunately, as we age, our natural inquisitiveness falls prey to insecurity. The opinion of others begins to matter and mental inquisitiveness is edited. It is this loss of spontaneous curiosity that makes the teaching of deductive reasoning necessary. The enjoyment of math has its foundation in the curiosity to question facts, and the reasoning to formulate logical conclusions. Math is fun because math makes sense. <h2>How To Get From Here To There Using Deductive Reasoning</h2> First documented by Aristotle in the 4th century B.C., deductive reasoning is basically top-down reasoning. Using information from a set of related data, deductive reasoning formulates a logically certain conclusion. For example:  “All the female members our family have brown eyes. Mary is a female member of our family. Therefore, Mary has brown eyes.” In this example, the facts regarding the family history of brown eyes lead to the obvious conclusion that Mary’s eyes are brown. As we advance further into more complicated deductive reasoning, the “facts to conclusion” path remains the same. There are three basic laws of logic that govern all deductive reasoning. The first is the Law of Detachment in which, like the example of brown eyes stated above, a conditional statement is made, a hypothesis is stated, and a logical conclusion is deduced from the information contained in both. The second is the Law of Syllogism in which two conditional statements are used. The conclusion is formed by combining the hypotheses of one conditional statement with the conclusion of the other. (if A = B, and B = C, then A = C). The third is the Law of Contrapositive in which the hypothesis is false if the conclusion of the conditional statement is false. (In winter, there is snow. There is no snow now. Therefore, it is not winter.) Finally, deductive reasoning is evaluated by the Validity and Soundness of its arguments. A deductive argument is valid if it is impossible for the premises to be true if the conclusion is false. (All people who work ride the bus. Bob works. Therefore, Bob rides the bus.) This argument is not valid because, though Bob may ride the bus, not all people who work do. A deductive argument is sound if it is valid and the premises are true.  <h3>Graphing The Results Of Deductive Reasoning</h3> Deductive reasoning is used extensively in the areas of statistics and probability. In statistics, the conclusion is determined by compiling a variation of data points in a given context. These data points can then be graphed to give visual presentation to numerical data. Graphs can be created in a number of different formats.  The following are just a few of the options: <img style="display: block; margin-left: auto; margin-right: auto;" src="http://www.sellyourcalculators.com/im_images/graph-chart-collection.gif" alt="deductive reasoning graphs" width="270" height="160" /> Whichever format you choose, using a good graphing calculator makes compiling the data to create the graph much easier. <a href="http://www.sellyourcalculators.com/">SellYourCalculators.com </a>is the one stop location for all your graphing calculator needs. We sell reasonably priced new and used calculators. We also pay competitive prices to buy back calculators that have served their purpose and are no longer needed. <a href="http://www.sellyourcalculators.com/contact/">Contact us</a> today for more information on our buy and sell options. Why Bother With Upper Level Math http://www.sellyourcalculators.com/blog/why-bother-with-upper-level-math http://www.sellyourcalculators.com/rss/why-bother-with-upper-level-math Your Calculator Seling Site Thu, 02 Oct 2014 22:29:00 -0500 <h1>What Is Upper Level Math?</h1> Upper level math is the final plateau in the basic study of mathematics.  <a href="http://www.sellyourcalculators.com/blog/keep-your-math-skills-sharp-this-summer">Building on mathematical foundation principles</a> learned in junior high, high school, and the early years of college, upper level math expands into the realm of conceptual visualization and abstract application. Usually reserved for college juniors and seniors, upper level math prepares the student for life outside the classroom. Job-specific upper level math courses are also available through many technical and community college programs. In the college curriculum, the progression to upper level math begins with lower level math courses. These courses tend to be comprehensive in scope, designed to provide an overview of mathematics and its relationship to other fields. <a href="http://www.sellyourcalculators.com/blog/keep-your-math-skills-sharp-this-summer">Lower level math courses develop essential skills</a>, like critical thinking and problem solving, and establish a strong foundation of principles, terms, and methods that will be used in the more advanced, upper level math studies. Upper level math courses narrow the scope, providing a more in-depth approach. At the upper level, courses become more abstract and are designed around specific goals. Upper level math encourages focus on the theory and method of specific disciplines in order to understand applications and limitations. The challenging contexts introduced at this level specialize and refine math skills to enable successful transition to real-world applications. <h2>Why Bother With Upper Level Math </h2> Many of us have heard that upper level math is irrelevant and no purpose in everyday life. The TV crime/drama series “Numb3rs,” put that idea to rest by introducing the use of extensive mathematical equations in the behavior analysis and apprehension of criminals.  In addition to forensic applications, upper level math plays an integral role in many good paying occupations in our modern, high-tech world.   Real-world applications of upper level math fall into three categories. Theoretical math deals with analytical applications that are essential to agricultural scientists, architects, biologists and chemists, systems analysts, engineers, foresters and conservationists, meteorologists, physicists, astronomers, and statisticians. Applied math makes use of specialized mathematical methods to solve practical problems. Professions that require a strong foundation in applied math include accountants and auditors, aircraft pilots and flight engineers, computer programmers, doctors and dentists, electrical technicians, financial managers, insurance actuaries, landscape architects, sociologists, surveyors, urban planners, and veterinarians. Practical or shop math is, as its name implies, hands-on mathematical application. Careers in this category include auto mechanics, bricklayers and stonemasons, broadcast technicians, carpenters, electricians, jewelers, machinists, millwrights, plumbers and pipefitters, sheet-metal workers, tool and die makers, and welders. <h3>The Value of a Good Graphing Calculator in Upper Level Math</h3> Meeting the demands of these technologically enhanced careers requires some high-tech help. The small but mighty <a href="http://www.sellyourcalculators.com/blog/top-3-graphing-calculators">graphing calculator</a> should be a staple in every upper level math student’s technological tool kit. A good graphing calculator expedites problem solving by eliminating tedious manual calculation and complex point-to-point graphing. To enhance conceptual understanding, the graphing calculator adds dimension to problem solving through table building, curve tracing, and critical point determination. By significantly reducing the time needed for problem solving, use of the graphing calculator allows time for dynamic dialogue which, in turn, encourages critical thinking. Finally, the graphing calculator supports the integration of mathematical concepts into other disciplines and, ultimately, into real-life applications. Proficiency in upper level math concepts can dramatically improve employment opportunity in careers from Agriculture to Zoology. For an upper level math student empowered by his faithful companion, <a href="http://www.sellyourcalculators.com/blog/the-graphing-calculator-from-pre-history-to-pre-calculus-and-beyond">the graphing calculator,</a> the possibilities are endless. <a href="http://www.sellyourcalculators.com/">SellYourCalculators.com</a> wants to pair you with the perfect graphing calculator to meet your upper level math needs.  We also buy back graphing calculators that are no longer needed. <a href="http://www.sellyourcalculators.com/contact/">Contact us today</a> for more information. Back to School Trends http://www.sellyourcalculators.com/blog/back-to-school-trends http://www.sellyourcalculators.com/rss/back-to-school-trends Your Calculator Seling Site Mon, 04 Aug 2014 13:14:00 -0500 <h1>Back to School Trends</h1> <a href="http://www.sellyourcalculators.com/blog/keep-your-math-skills-sharp-this-summer">Summer break</a> is nearly over and it’s time to think about back to school shopping. Trips to the mall are planned to check out the latest back to school clothing trends. Whether you prefer layers of ruffles and sparkly shoes or casual denim with high-top sneakers and leggings, you’re sure to find something that’s just right on the overstocked store racks. Exhausted parents wait while their elementary students choose and re-choose the perfect character backpack from princesses, ponies, and pets to planes, cars, and warriors. The high school and college crowd embark on a search for an expandable tote that can hold a load large enough to cripple a pack animal. Then there’s the ever-expanding list of “School Supplies.” The paper, pencils and crayons of elementary school graduate to tablets, laptops and recording devices as students expand their education to high school and beyond.   <h2>Academic Back to School Trends</h2> Sadly, when it comes to back to school trends, academic achievement doesn’t seem to generate the same excitement as clothing and supplies. In fact, US students tend to score poorly in worldwide math and science rankings. In one comprehensive multi-year study, the proficiency of approximately 5,000 students from diverse educational systems worldwide was assessed. Students were initially tested in 4th grade and again in 8th grade to determine trends in student performance.   The results of 9 testing periods (4 at the 4th grade level and 5 at the 8th grade level), found <a href="http://www.sellyourcalculators.com/blog/keep-your-math-skills-sharp-this-summer">math </a>scores for US students in the top ten only twice.  Both were at the 8th grade level and, in both, US students placed 9th behind students from the Far East, Eastern Europe and Scandinavia. In science, US students began with a promising 3rd place in the baseline 4th grade testing. Although US students placed in the top 10 three more times at the 4th grade level, their ranking had dropped out of the top five and were exhibiting a notable downward trend. By 8th grade, this downward trend had become so significant that US students placed in the top 10 only twice, both times at the bottom of the list. Similar results in comparable studies demonstrate the importance of establishing back to school programs designed to improve US test scores in the worldwide academic arena. <h3>Improving Academic Back to School Trends</h3> Reversing this disturbing downward trend is imperative. Knowledgeable educators believe that deductive reasoning should be an important part of the daily curriculum at every class level. Encouraging students to question how math and science solutions are determined enables them to visualize the often abstract concepts. As students become adept at explaining how deductions are reached, they can begin to successfully analyze and solve problems using clearly defined mathematical or scientific strategies. At the elementary level, learning to create picture problems and use a simple calculator will help students build a strong problem solving foundation. The introduction of algebra, geometry and chemistry in middle school and high school presents a more complex variety of problems.  At this level, development of statistical reasoning (the ability to make sense of variations in data) and a good graphing calculator are a must. Strong analytical skills and a versatile calculator will enable college students to systematically visualize and effectively solve math and science problems, no matter how complex. If improving math and science skills are a priority in your back to school agenda, <a href="http://www.sellyourcalculators.com/">sellyourcalculators.com</a> can help. We buy and sell new and used brand name calculators, including Casio, HP, and Texas Instruments, at competitive prices. We want to be the one-stop destination for all your graphing, financial and scientific calculator needs. <a href="http://www.sellyourcalculators.com/contact/">Contact us today</a> for more information. Keep Your Math Skills Sharp This Summer http://www.sellyourcalculators.com/blog/keep-your-math-skills-sharp-this-summer http://www.sellyourcalculators.com/rss/keep-your-math-skills-sharp-this-summer Your Calculator Seling Site Fri, 20 Jun 2014 13:14:00 -0500 <h1>Keeping Your Math Skills Sharp This Summer</h1> It’s summer… no more classes, no more books, etc, etc, etc!  Fine-tuning <a href="http://www.sellyourcalculators.com/blog/using-graphing-calculators-on-the-sat-act">your math skills</a> is the last thing on your mind. Shorts and sandals are looking really good and somewhere there’s a beach or pool with your name on it. It’s time to kick back and enjoy your freedom! Everyone needs an occasional escape from the routine of daily life. While this is certainly true for students, experts have found that long absences, like summer break, can result in a nearly two month set-back in learning.  This is especially critical in the case of math skills, which are often difficult to master in the sterile environment of the classroom. Learning math skills can be compared to learning to play an instrument or a sport. Practice makes the difference between being OK and being GREAT! Learning to use math in real life situations will enable you to visualize mathematical theories that are too often merely abstract concepts.  <h2>Some Summer Applications for Those Classroom Math Skills</h2> We’re all familiar with the old adage, “use it or lose it.”  Learning to convert your classroom mathematics into practical math skills will put you ahead of the game when classes resume in the fall. Best of all, using your math skills during the summer doesn’t have to feel like doing homework.  There are many math-based websites that present <a href="http://www.sellyourcalculators.com/blog/graphing-calculator-apps-for-iphones">interactive math problems in a gaming format</a> that will appeal to students from pre-K to pre-Algebra. These websites are the perfect venue to use your gaming ability to enhance your math skills.    For older students with strong math skills, a summer job as a math tutor or a volunteer in a math and science museum will keep skills sharp and provide positive work experience that can be included on a resume for college or a job.  Math students of all ages and skill levels can also take advantage of summer camps and educational events that use math and science principles to create challenging hands-on experiments and activities. Check with your local libraries, parks department, and other civic organizations for information on math-based summer programs in your community.  <h3>Practical Math Skills and Your Graphing Calculator</h3> If you own a <a href="http://www.sellyourcalculators.com/">graphing calculator</a>, summer provides limitless opportunities to put your math skills to use.  Are you a sports fan? Calculate team and player stats. Interested in finances? Graph market trends to spot potentially lucrative investments. Taking a summer trip? Graph the route, determine the mileage, calculate the cost of fuel, and estimate a time of arrival. Going grocery shopping? Save money by figuring cost-per-unit percentages. Want to be an architect or engineer? Create designs for everything from simple paper airplanes to elaborate shopping malls. Need more real-life math ideas? Do a little summer surfing! The web is full of sites that will enhance your math skills in interactive formats guaranteed to challenge and entertain.  Perhaps you’ve already found math programs you’d like to try, but you don’t have a graphing calculator. Perhaps you’re ready for an upgrade, but don’t want to spend a fortune. Whatever your situation, sellyourcalculators.com is the online destination to visit. <a href="http://www.sellyourcalculators.com/contact/">Contact us today</a> for more information or a buy-back quote. The Graphing Calculator from Pre-History to Pre-Calculus and Beyond http://www.sellyourcalculators.com/blog/the-graphing-calculator-from-pre-history-to-pre-calculus-and-beyond http://www.sellyourcalculators.com/rss/the-graphing-calculator-from-pre-history-to-pre-calculus-and-beyond Your Calculator Seling Site Fri, 21 Mar 2014 11:57:00 -0500 <h1>Prehistoric Graphing Calculators</h1> In the beginning, the earth was totally devoid of calculators, graphing or otherwise. Prehistoric man had only his fingers and toes to count stuff. Fortunately, prehistoric man didn't have much stuff, and so, his limited method of calculation was sufficient and he was happy. Then came the ice age. The survival of prehistoric man now depended upon warm clothing, hunting prowess and the ability to store food. Stuff began to accumulate. Prehistoric man soon realized that he needed a way to keep track of this stuff and primitive calculation was born. <h2>Graphing Calculators and Advancing Civilization</h2> Time passed and life changed. Early man built huts, kept livestock and tended gardens. As more and more stuff was acquired, pebbles and twigs, plus fingers and toes, were needed to keep count. Time also brought "civilization." Tribes became villages, villages became towns, and, as early man began to interact with his neighbors, a new idea emerged. Man soon realized that he could get what he did not have from his neighbors by trading his stuff for their stuff. While mutually beneficial, this exchange also created the need to keep track of the stuff that was traded. Calculation was fast becoming an integral part of "civilized" life. Stone and clay gave way to bronze and gold and man began to develop an appetite for stuff. Stuff meant influence and power, but, more stuff meant that man would need a more efficient way to keep track of it. To meet this need, the first external calculating device, a stone and sand abacus, was developed in Mesopotamia in 2400 BC. By the first century AD, the abacus was made of beads on wires was widely used throughout the Roman Empire, and in Greece, Egypt, China, and India. Markets grew rapidly as large quantities of stuff moved along trade routes. Calculation methods, however, were slow to keep pace. It took nearly 1500 years to catch up. In ancient Europe, mathematical problems were calculated manually, sometimes taking up to a year to solve. The speed of calculation finally began to improve when a German inventor, Wilhelm Schickard, built the first mechanical calculator in 1623. Called the Calculating Clock, it consisted of a multiplying device, a mechanism for recording intermediate results, and a device for adding and subtracting 6-decimal numbers using a system of interlocking gears. The science of mechanical calculation marched onward, and in 1642 an adding/subtracting machine, The Pascaline, was developed in France by Blaise Pascal to help deal with tax records…the tax collector cometh, even then. In 1773, Phillip Hahn, a German clock maker, developed the first functional cylindrical calculator to help determine parameters for his clocks and planetariums. It was not until 1820, however, that a commercially produced mechanical calculator able to add, subtract, multiply, and divide was introduced. Advancements followed rapidly and the mechanical calculator, once a high-price curiosity for the rich, reached widespread availability in less than 100 years. <h3>The Modern Age of Graphing Calculators</h3> The industrial revolution of the 19th century brought significant changes to mechanical calculation. Market availability increased and the size of the calculator decreased as the mechanism itself changed from cylinders, levers and gears to push button keys. In 1902, mechanical calculation arrived in America with the invention of the Dalton Adding Machine featuring a push-button user interface. This was followed by a dramatic lull. Once again, technology was unable to keep pace with ingenuity. Calculator development slowed until 1954 when the invention of silicon transistors made miniaturization possible. The birth of modern electronics was at hand. In June 1963, the Friden EC-130 all transistor calculator was manufactured in the US. Its revolutionary design included a stack of four 13-digit numbers, a 5-inch CRT display, and the first reverse Polish notation. The technology of calculation sped forward at an amazing pace. LED displays were replaced by LCD, disposable batteries became re-chargeable and then were replaced by solar power, integrated circuits (microchips) increased functionality, and calculation evolved from a simple mathematical tool to an intricate art form. From the sticks and stones of ancient cave dwellers to the multi-functional capabilities of modern graphing calculators, technology continues to expand man's ability to manage stuff. From graphing the slopes of lines in a pre-calculus class to creating business applications like graphing weather statistics and market trends to programming popular games, the options are virtually endless. Investigate the possibilities and enjoy the results, but when you've finished with your old friend, the graphing calculator, contact us at sellyourcalculators.com for a buy-back estimate. We want to be the buy-back destination for your old graphing calculator. Selling Used Calculators - The Buyback Process in Detail http://www.sellyourcalculators.com/blog/selling-used-calculators-the-buyback-process-in-detail http://www.sellyourcalculators.com/rss/selling-used-calculators-the-buyback-process-in-detail Your Calculator Seling Site Sun, 23 Feb 2014 21:49:00 -0600 <h1>Selling Used Calculators thru a Buyback Program</h1> <a href="http://www.sellyourcalculators.com/">Selling used calculators</a> can be easy especially when it’s done through a buyback program like <a href="http://www.sellyourcalculators.com/about/">Sell Your Calculators</a>. Using a buyback program eliminates the hassles of finding a buyer, listing and paying the fees associated with garage sale and auction sites and is guaranteed money. Depending on the site that is used, money can be delivered in as little as a few days. The whole process takes 3 simple steps. The first is to find a site and grade the calculator. The second is to register and select a method of payment. And the final step is to choose how payment should be received and to ship the used calculator. Before you know it, the money will be on its way. The most difficult part of the process for most people is grading the used calculators accurately. <h2>Grading Used Calculators</h2> <a href="http://www.sellyourcalculators.com/faq/">Grading used calculators</a> is a subjective process that can leave you scratching your head. Following a few simple guidelines, you will be able to accurately grade the condition of <a href="http://www.sellyourcalculators.com/">your used calculator </a>successfully. The overall grading scale is similar to that of grading a used car. Condition grading for used calculators is as follows: Poor, Fair, Good, Great, Mint and New in Box. A breakdown of each grading is listed below: Poor The used calculator has cracked housing, deep scratches, missing screws, broken or missing  battery cover, broken or missing cover, dents, stickers, marker,  white-out, etc., scratched display, LIGHT BLACK SPOTS ON SCREEN (DEAD CELLS) BUT CALCULATOR STILL WORKS AND SCREEN IS READABLE. FAIR The used calculator has cracked housing, deep scratches, missing screws, dents, stickers, marker, white-out, etc., scratched display GOOD The used calculator has permanent marker, extensive use, or one or more missing rubber grips GREAT The used calculator has light wear or light scratches or markings MINT The used calculator is aesthetically perfect, no flaws, looks shiny and brand new New-in-Box The used calculator has retail packaging that has never been opened (Still Sealed) Accurately grading a used calculator can save time and insure that the original quote is the amount that is received. Often times, a discrepancy in the grading of a used calculator will result in a new quote being provided before funds are sent. This can delay receipt of funds. <h3>Sell Your Calculators Used Calculator Buyback Program</h3> Selling used calculators through a buyback program like <a href="http://www.sellyourcalculators.com/">Sell Your Calculators</a> is an easy way to earn cash for your used calculator. A few simple steps and a little effort on your part will insure that you receive the highest payout for your used calculator. If you are uncertain about a program and its requirements, contact the company. They should be more than happy to answer any questions that you might have. If they are delayed in responding or don’t provide adequate information, then it is probably best to consider another buyback program or different options for selling your used calculator. We invite you to <a href="http://www.sellyourcalculators.com/contact/">contact the friendly staff at Sell Your Calculators today</a> to learn how we can help you earn cash for your used calculators. Top 3 Graphing Calculators http://www.sellyourcalculators.com/blog/top-3-graphing-calculators http://www.sellyourcalculators.com/rss/top-3-graphing-calculators Your Calculator Seling Site Thu, 23 Jan 2014 09:19:00 -0600 <h1> Top 3 Graphing Calculators</h1> The study of mathematics has changed dramatically since the basic math our forefathers trudged “up-hill both ways barefoot in the snow” to learn. Since modern math requires advanced capabilities to plot lines and create graphs of numeric functions, a <a href="http://www.sellyourcalculators.com/">good graphing calculator </a>has become the math student’s best friend. When <a href="http://www.sellyourcalculators.com/blog/choosing-the-right-graphing-calculator">choosing a graphing calculator</a>, there are four important factors to consider.                         <ul> <li>Features. These are the technical aspects of the device. RAM (random-access memory), ROM (read-only memory), screen resolution and input styles must be sufficient to meet class requirements.</li> </ul>   <ul> <li>Durability and Longevity.   A good graphing calculator should be able to weather a bit of rough handling, perform multiple mathematical functions quickly, remain useful or more than a single school term, and be compatible with standardized tests that require a calculator. </li> </ul>   <ul> <li> Ease of Use. The calculator should be user-friendly with intuitive menus, easy to read buttons, and clear, high contrast read-outs.</li> </ul>   <ul> <li> Support and Warranty. The complexity of today’s graphing calculators makes the availability of detailed user manuals and readily accessible, high quality technical support critical. A manufacturer’s warranty should also be provided.</li> </ul>   <h2>Top Quality Graphing Calculators That Offer More Bang for Your Buck</h2> The following trio of graphing calculators is representative of devices that are powerful enough to meet classroom requirements and durable enough to survive the crush of a heavy backpack.   <ul> <li>The TI 84 Plus from Texas instruments, a <a href="http://www.sellyourcalculators.com/blog/graphing-calculator-apps-for-iphones">high quality graphing calculator </a>used in high schools and universities worldwide, is a durable, user-friendly devise that is compatible with all major tests, including the SAT, ACT, and AP. While not as versatile as some graphing calculators, the TI 84 Plus easily handles all essential math needs, from the basic functions of multiplication and exponents to advanced course work in Algebra and Calculus. Many users report that they were able to use the TI 84 Plus graphing calculator through high school and college without need of an upgrade.</li> </ul> Features:         ROM: 480 KB  RAM: 24 KB                                        Display: 160 pixels x 120 pixels with a high-contrast read-out                                     Input Method: algebraic (infix)                                     Tech Support: Extensive        Warranty: Limited One Year   <ul> <li>The durable HP 50g from Hewlett-Packard is a virtual powerhouse packed with features. This versatile graphing calculator allows multiple input methods, including the standard algebraic (infix) and the popular Reverse Polish Notation (NPR). A solid feature set with multiple subject capability makes the HP 50g a valuable classroom tool. It is approved for all major tests, except the ACT. Although there are drawbacks, like less classroom compatibility and a slightly slower calculating speed, superior customization potential, SD card capability, and exceptional manufacturer support make this graphing calculator a good investment. The HP 50g has over 2300 built-in functions and adjustable type size. It may be a bit of a challenge to master all the options, but once you have, the extensive array of features and expanded storage capability of this graphing calculator will easily meet all your high school and college math needs. </li> </ul>             Features:         ROM: 2 MB     RAM: 512 KB                                     Display: 131 pixels x 80 pixels                                       Input Method: algebraic (infix) and Reverse Polish Notation (RPN)                                     Tech Support: Extensive        Warranty: Limited One Year   <ul> <li>The TI 89 Titanium, another graphing calculator from Texas Instruments, is a powerful device packed with subject support for nearly every major class from high school algebra and trigonometry to college calculus and physics. The most unique feature of the TI 89 Titanium is its graphical interface that uses icons, rather than buttons and menus, to locate specific functions. Although this graphing calculator has fewer features and slightly less RAM than others on the market, its impressive hardware and ample storage capacity make it a great choice. The extensive class compatibility, ease of navigation, and significant computation power of the TI 89 Titanium easily overshadow its slightly smaller screen and harder to read display. The main drawback is that the advanced function editors and formulas on this model have disqualified it from use in certain classroom settings and on some major tests, like the ACT. Despite its negatives, the TI 89 Titanium is a versatile graphing calculator durable enough to survive student life.</li> </ul>             Features:         ROM: 2.7 MB  RAM: 188 KB                                     Display: 100 pixels x 160 pixels                                     Input Method: Algebraic                                     Tech Support: Extensive        Warranty: Limited One Year   <h3>Saying Good-Bye To Your Graphing Calculator</h3> These are just a few of the many <a href="http://www.sellyourcalculators.com/blog/graphing-calculator-technology-and-trends">fine graphing calculators </a>available. Be selective when making your choice and choose one that will last. A high quality graphing calculator may cost more initially, but will save money over the long run. You will enjoy years of service without the cost of replacements, and, when the time comes to part ways, you can sell the device and recoup some of your investment. If that time is now, <a href="http://www.sellyourcalculators.com/about/">Sell Your Calculators </a>would love to be your sell back destination. <a href="http://www.sellyourcalculators.com/contact/">Contact us</a> today for an instant quote on your used Casio, HP, or Texas Instruments graphing calculator. 5 Weird and Wacky Last Minute Gifts http://www.sellyourcalculators.com/blog/5-weird-and-wacky-last-minute-gifts http://www.sellyourcalculators.com/rss/5-weird-and-wacky-last-minute-gifts Your Calculator Seling Site Tue, 24 Dec 2013 11:30:00 -0600 <h1>5 Weird and Wacky Last Minute Gifts</h1> <img style="vertical-align: middle; margin: 5px;" src="http://www.sellyourcalculators.com/im_images/Gifts2.jpg" alt="" width="300" height="282" /> There's still time, a few hours left to pick up one of these, er, different, gifts.  And don't forget to sell that old calculator to recoup some of the money you spent! <img style="vertical-align: middle; margin: 5px;" src="http://www.sellyourcalculators.com/im_images/Bug_Vac.jpg" alt="" width="300" height="201" /> <h2><a href="http://www.skymall.com/bug-vacuum-hand-held-electronic-insect-trap/BV01.html">Bug Vacuum</a></h2> No need to haul out the Hoover to suck up that pesky fly, just relocate the pests in your home to new living quarters inside of this contraption. <img style="vertical-align: middle; margin: 5px;" src="http://www.sellyourcalculators.com/im_images/banana_slicer.jpg" alt="" width="300" height="300" /> <h2><a href="http://www.neatlysmart.com/catalog/item.aspx?sku=78059&gclid=CLPbhKfNprsCFbA7MgodXBMAZw">Banana Slicer</a></h2> People, please.  Haven’t we all had enough of uneven banana slices?  Stop the madness with this slicer that will give you identically sliced pieces every time, guaranteed. <img style="vertical-align: middle; margin: 5px;" src="http://www.sellyourcalculators.com/im_images/tv.jpg" alt="" width="300" height="282" /><a href="http://www.amazon.com/Samsung-UN85S9-85-Inch-Ultra-120Hz/dp/B00CMEN95U/ref=sr_1_1?ie=UTF8&qid=1386127888&sr=8-1&keywords=Samsung+UN85S9+85-Inch+4K+Ultra+HD+120Hz+3D+Smart+LED+TV&tag=hydfbook0e-20&ascsubtag=US-SAGE-1385847362122-JUNEH"></a> <h2><a href="http://www.amazon.com/Samsung-UN85S9-85-Inch-Ultra-120Hz/dp/B00CMEN95U/ref=sr_1_1?ie=UTF8&qid=1386127888&sr=8-1&keywords=Samsung+UN85S9+85-Inch+4K+Ultra+HD+120Hz+3D+Smart+LED+TV&tag=hydfbook0e-20&ascsubtag=US-SAGE-1385847362122-JUNEH">Samsung UN85S9 85-inch 4K Ultra HD 120 Hz 3D Smart LED TV</a></h2> For those of you itching to get rid of that spare $40k you have in your pocket, this TV seems like a worthy investment, according to the Amazon reviews. <img style="vertical-align: middle; margin: 5px;" src="http://www.sellyourcalculators.com/im_images/sandals.jpg" alt="" width="300" height="282" /> <h2><a href="http://kusashoes.com/">KUSA Grass Flip Flops</a></h2> Feeling confined in the burrows of the concrete jungle?  Slip on these beauties to feel the grass between your toes anytime, anywhere.  Taking barefoot in the park to a whole new level. <img style="vertical-align: middle; margin: 5px;" src="http://www.sellyourcalculators.com/im_images/Pen.jpg" alt="" width="300" height="282" /> <h2><a href="http://www.bestbuy.com/site/lenspen-digiklear-display-cleaner/6304996.p?id=1218731588875&skuId=6304996&ref=06&loc=01&ci_src=14110944&ci_sku=6304996&extensionType={adtype}:{network}&s_kwcid=PTC!pla!{keyword}!{matchtype}!{adwords_producttargetid}!{network}!{ifmobile:M}!{creative}&kpid=6304996&k_clickid=d0aa29b1-e33e-4118-a6b9-d1c79d4925fb">Digiclear Display Cleaning System</a></h2> When a little spit and your sleeve just won’t do, clean the smudges off of your cell phone with this useful tool. 5 Fun Techy Gifts Sure to Please http://www.sellyourcalculators.com/blog/5-fun-techy-gifts-sure-to-please http://www.sellyourcalculators.com/rss/5-fun-techy-gifts-sure-to-please Your Calculator Seling Site Thu, 12 Dec 2013 16:21:00 -0600 <h1>5 Fun Techy Gifts Sure to Please</h1> <img style="vertical-align: middle; margin: 5px;" src="http://www.sellyourcalculators.com/im_images/Gifts.jpg" alt="" width="300" height="282" /> Here are five winning gift ideas for the techy in your life this holiday season.  Heck, after all the giving is done you may even want to snatch one for yourself. <h2><img style="margin: 5px; vertical-align: middle;" src="http://www.sellyourcalculators.com/im_images/GPod.jpg" alt="" width="300" height="282" /></h2> <h2><a href="http://joby.com/gorillapod/original/">Joby GorillaPod Stand</a></h2> Take a break from spelling upside-down words on your calculator and snap some photos of your friends.  Or consider using this flexible tripod to score selfies of yourself spelling upside-down words on your calculator. <img style="vertical-align: middle; margin: 5px;" src="http://www.sellyourcalculators.com/im_images/book.jpg" alt="" width="300" height="282" /> <h2><a href="http://www.barnesandnoble.com/w/geeks-shall-inherit-the-earth-alexandra-robbins/1100091991">The Geeks Shall Inherit the Earth, by Alexandra Robbins</a></h2> Give the geek in your life hope for the future with this scientific look at popularity and how it affects success later in life. <img style="vertical-align: middle; margin: 5px;" src="http://www.sellyourcalculators.com/im_images/ipod2.jpg" alt="" width="300" height="205" /> <h2><a href="http://www.macmall.com/p/Olloclip-Cellular-Telephony/product~DPNo~9826470~pdp.ieecbeg?source=mwbgoogleshop&adtype=pla&kw={keyword}&gclid=CMGH-Y_Qq7sCFcxAMgodPWkAJQ">Olloclip Lens System for iPhone 5</a></h2> Snap this on your iPhone for photos in a flash.  Use it with your new GorillaPod for a really rocking picture taking experience. <img style="vertical-align: middle; margin: 5px;" src="http://www.sellyourcalculators.com/im_images/clock2.jpg" alt="" width="300" height="204" /> <h2><a href="http://www.momastore.org/museum/moma/ProductDisplay_Verbarius%20Electronic%20Clock__10001_152597_-1_26663_26663_152641">Verbarius Digital Clock</a></h2> Watch the clock in style with this modern desktop timepiece.   <img style="vertical-align: middle; margin: 5px;" src="http://www.sellyourcalculators.com/im_images/tray.jpg" alt="" width="300" height="281" /> <h2><a href="http://www.thinkgeek.com/product/b61a/">Pi Ice Cube Tray</a></h2> Finally, what better way to chill your Christmas cocktail than with ice cubes in the shape of the 16th letter of the Greek alphabet? Five Good Reasons to Sell Your Used Graphing Calculator http://www.sellyourcalculators.com/blog/five-good-reasons-to-sell-your-used-graphing-calculator http://www.sellyourcalculators.com/rss/five-good-reasons-to-sell-your-used-graphing-calculator Your Calculator Seling Site Tue, 26 Nov 2013 12:00:00 -0600 <h1>The Saga of the Graphing Calculator</h1> The start of the school year always brings with it an expensive list of curriculum must-haves. For the Math and/or Science student, one of the most expensive items on that list is sure to be a graphing calculator.  Maybe you’ve used <a href="http://www.sellyourcalculators.com/blog/what-to-do-with-my-used-graphing-calculators">a graphing calculator</a> before – maybe not - but you bite the bullet and go out to get the thing. Talk about sticker shock! How can something so boring cost so much? There are so many other things you could do with that money…but the decision is out of your hands. So you buy it, learn how to use it, and make it your best friend for the duration of the class. Now, however, that class is over and you’re ready to dump your old “bestie,” the <a href="http://www.sellyourcalculators.com/blog/what-to-do-with-my-used-graphing-calculators">graphing calculator.</a> <h2>The Top Five Reasons to Sell Your Graphing Calculator </h2> As you contemplate your options, the “sell it back” option takes top billing. The initial cost of <a href="http://www.sellyourcalculators.com/blog/choosing-the-right-graphing-calculator">the graphing calculator</a> still lingers in your memory. Why not get some of that cash back? After all, there are things to do and who needs a used graphing calculator just lying around gathering dust anyway. So you begin to come up with reasons to sell. 5. Pizza sounds better than a used graphing calculator 4. There’s a big sale and you really need some decent clothes 3. You could use some new games for your iPad 2. You really want tickets for that concert 1. Gas – yes!   <h3>How to Rid Yourself of That Used Graphing Calculator</h3> Now all you have to do is find someone to buy your <a href="http://www.sellyourcalculators.com/blog/choosing-the-right-graphing-calculator">used graphing calculator</a> and you can get on with your life. There are a number of venues to consider. Garage Sales are an option, but remember garage sale shoppers are hunting for bargains and you will have to put a bargain price on your used graphing calculator to sell it. Online sites like Ebay and Craigslist provide a broader buyer base, but there are some costs, like listing fees or shipping expenses, that may be involved. Another online option is a “buy back” site. These sites pay cash for used technical equipment like graphing calculators based on the condition of the item. <a href="http://www.sellyourcalculators.com/">SellYourCalculators.com</a> is perhaps the most user-friendly buy back site online today. They offer premium buy back prices and getting your money is as easy as 1-2-3.         1. Register (registration is free) 2. Choose how you want to be paid (check, money order, or PayPal) 3. Print your shipping label (shipping is free) At <a href="http://www.sellyourcalculators.com/">SellYourCalculators.com</a>, we pride ourselves on providing an easy to navigate site, excellent in-house customer service, and the fastest shipping time available. We would love to be your graphing calculator sell back destination.  If you have any questions, please <a href="http://www.sellyourcalculators.com/contact/">contact us today</a> at <a href="http://www.SellYourCalculators.com">www.SellYourCalculators.com</a>. Using Your Graphing Calculator for Calculus and Statistics http://www.sellyourcalculators.com/blog/using-your-graphing-calculator-for-calculus-and-statistics http://www.sellyourcalculators.com/rss/using-your-graphing-calculator-for-calculus-and-statistics Your Calculator Seling Site Wed, 04 Sep 2013 20:17:00 -0500 <h1>Using Your Graphing Calculator</h1> <a href="http://www.sellyourcalculators.com/blog/using-the-ti-83-plus-calculator">Using a graphing calculator</a> makes light work of most math calculations. Unfortunately, figuring out how to use your graphing calculator can be challenging for those who have never used one before. In addition to learning new terminology and symbols, you are plagued with learning how to tell your graphing calculator what you want it to do. This information presented in this article will outline how to use various functions on your <a href="http://www.sellyourcalculators.com/blog/choosing-the-right-graphing-calculator">graphing calculator</a>. <h2>Tips for Using Graphing Calculator Calculus Functions</h2> Using <a href="http://www.sellyourcalculators.com/">graphing calculators</a> to perform calculus functions is a requirement in most Calculus courses. Your graphing calculator will help you solve the following: Arithmetic calculations – enter the information as shown using (), ^, etc. as necessary. Press “enter” to     complete the calculation Define and evaluate functions – use your “Y=” key, “X|T” allows you to enter independent variables Graph functions and make meaningful changes to the viewing window – use the Zoom key and select         option 8 for the integer & press “enter,” “range” will give you the specifications of the viewing      window, “graph” key will allow you to view the graph again, arrow keys allow you to move around      the viewing window Trace the graph of a function – the “trace” button will allow you to use the right & left arrows to move      the cursor along the graph. Make function tables – the “PRGM” key and then “edit” will allow you to enter table information. In addition to these functions, you will also be able to find maxima and minima of functions, find function derivative, graph derivatives over an interval, find definite integrals of functions over intervals and graph the slope curve of a differential equation utilizing your user’s guide or by going online to your calculators manufacturer’s website. <h3>Tips for Using Graphing Calculator Statistical Functions</h3> In order to enter the statistical package on your graphing calculators, you will want to press the “STAT” button. On TI Calculators, you will see 3 options: Edit, Calc and Tests. Edit gives you the ability to enter and modify the data to be used in the Calc and Tests features. Calc allows you to make calculations using the data stored in the columns through the Edit feature Tests allow hypothesis testing, develops confidence intervals and creates ANOVA table values. As you can see, using a <a href="http://www.sellyourcalculators.com/">graphing calculator</a> will make course work more meaningful and easier to complete utilizing any of the many calculus and statistical features available. If you are looking to upgrade to a newer graphing calculator, consider getting cash back with our <a href="http://www.sellyourcalculators.com/about/">SellYourCalculators buyback program</a>.   Graphing Calculator Technology and Trends http://www.sellyourcalculators.com/blog/graphing-calculator-technology-and-trends http://www.sellyourcalculators.com/rss/graphing-calculator-technology-and-trends Your Calculator Seling Site Tue, 03 Sep 2013 12:33:00 -0500 <h1>Graphing Calculator Technology – New or Not?</h1> <a href="http://www.sellyourcalculators.com/blog/ti-nspire-tips-and-tricks">Graphing calculators technology</a> has changed, albeit very little, in the past 20 years. With the advent of the touch screen, graphing calculators have jumped on board. Beyond that, however, <a href="http://www.sellyourcalculators.com/blog/choosing-the-right-graphing-calculator">graphing calculators and their technology </a>have changed very little. So, why with all the technological advancements in other industries has the graphing calculator industry remained nearly the same? <h2>Graphing Calculator Technology – Reluctant for Change</h2> <a href="http://www.sellyourcalculators.com/blog/choosing-the-right-graphing-calculator">Graphing calculators</a> have changed very little over the past two decades for several reasons. First and foremost, the need for increased functionality has not been warranted. Most high school level math classes have changed their material very little in the past twenty years as schools still require the same classes and same material to be covered. As a result, high school students do not need new technology to accomplish the same things. This also helps to minimize school supply costs because <a href="http://www.sellyourcalculators.com/about/">used calculators</a> are being passed from generation to generation. Not to mention, teachers definitely have their “favorites” when it comes to graphing calculators. Teachers will often make recommendations for graphing calculators to be used in their class because they can utilize their current handouts and they work. Finally, standardized test administrators have very specific guidelines on what <a href="http://www.sellyourcalculators.com/blog/using-graphing-calculators-on-the-sat-act">types and brands of graphing calculators can be used on their tests</a>. This has made the graphing calculators manufacturers reluctant to make too many changes. Each of these factors has contributed exponentially to the stasis of the graphing calculator industry. <h3>Graphing Calculator Technology – What’s in Store…</h3> While graphing calculator manufacturers have made few changes to their technology, they have toyed with changing their interfaces and looks. Unfortunately, the reception of these changes has been mild. The old adage, “if it ain’t broke, don’t fix it” plays strongly in this market. Our guess is that until coursework or technology mandate a change, graphing calculator manufacturers will continue producing the same technology in the same style. If you’ve moved beyond your graphing calculators days, consider participating in the <a href="http://www.sellyourcalculators.com/">SellYourCalculators buyback program</a>.   Choosing the Right Graphing Calculator http://www.sellyourcalculators.com/blog/choosing-the-right-graphing-calculator http://www.sellyourcalculators.com/rss/choosing-the-right-graphing-calculator Your Calculator Seling Site Tue, 30 Jul 2013 18:35:00 -0500   <h1>Choosing a Graphing Calculator based on Purpose</h1> Choosing the right <a href="http://sellyourcalculators.com/">graphing calculator</a> is strongly dependent upon on what the calculator is going to be used for. For instance, certain graphing calculators are allowed for college entrance and graduate entrance exams. Some graphing calculators are specifically designed for work in a given course or profession. Still others provide cross functionality and compatibility with downloads and apps. Graphing calculators can be extremely helpful when taking college and graduate entrance exams. It is important, however, to know the rules governing the use of graphing calculators. The <a href="http://sellyourcalculators.com/blog/using-graphing-calculators-on-the-sat-act">SAT and ACT tests allow the use of graphing calculators</a> during the math portion of the exam only. Graphing calculators for this purpose must be battery powered and cannot have a QWERTY keyboard and stylus/pen input devices. They are not allowed to make noises either. <a href="http://sellyourcalculators.com/blog/using-graphing-calculators-on-the-sat-act">Learn more about test rules governing the use of graphing calculators</a>. In addition to testing, <a href="http://sellyourcalculators.com/">graphing calculators</a> can be helpful when taking certain courses. Financial calculators are designed specifically for performing financial calculations like amortizations, rates and payments. Graphing calculators will help in graphing points, solving problems with variables and solving simultaneous equations. Many students find it beneficial to have a graphing calculator in some high school math courses and college level courses. <h2>Graphing Calculator Features, Downloads and Apps</h2> Today, graphing calculators have a variety of features, downloads and apps that make them a more powerful tool for math students and professionals. With added features like expanded memory, computer software and pre-loaded applications, students and professionals will find that graphing calculators are easily adaptable to their needs. Apps, including <a href="http://sellyourcalculators.com/blog/downloading-graphing-calculator-games">downloadable games</a> and images, make using graphing calculators more enjoyable. <h3>Graphing Calculators – Where to Look</h3> Whether it’s for testing purposes, class work or professional applications, graphing calculators are a beneficial tools. Today’s graphing calculators are full of useful tools, added features, downloadable applications and capability features that make them an asset for any mathematician or professional. <a href="http://www.buyyourcalculators.com/">Buyyourcalculators.com</a> has a variety of graphing calculators available for purchase. If you already have a graphing calculator that you would like to sell or upgrade, check out <a href="http://sellyourcalculators.com/">www.sellyourcalculators.com</a>.   Graphing Calculator Apps for iPhones http://www.sellyourcalculators.com/blog/graphing-calculator-apps-for-iphones http://www.sellyourcalculators.com/rss/graphing-calculator-apps-for-iphones Your Calculator Seling Site Sun, 07 Jul 2013 09:10:00 -0500 <h1>Graphing Calculator Apps versus Graphing Calculators</h1> At some point in your math career, you will need to consider the necessity of a <a href="http://www.sellyourcalculators.com/">graphing calculator</a>. While it may seem like purchasing a graphing calculator is your only option, many students find graphing calculator apps to be a viable option for their classes. Graphing calculator apps are great for doing homework and class work – if your teacher will allow the use of an iPhone in class. The downfall to graphing calculator apps is that not all teachers allow iPhones to be used during class time. Also, iPhones and other cell phone apps are not allowed to be used on college admissions exams. For many students, this can be the determining factor as to whether you purchase a graphing calculator. Graphing calculator apps may be a good option if you have the ability to borrow a <a href="http://www.sellyourcalculators.com/">graphing calculator</a> from a friend, teacher or another source in those instances where your iPhone is not allowed. <h2>Graphing Calculator Apps for iPhones</h2> Graphing calculator apps are all over the place. Depending on your need and the cost, you can find everything from very basic apps to extremely complex apps. Below is a listing of several graphing calculator apps currently available for iPhones. Robust Graphing Calculator Apps PCalc HP 12C Platinum Financial Calculator Graphing Calculator HD Simple Graphing Calculator Apps QuickGraph RetroCalc Jumbo Calc Free Graphing Calculator App from iTunes Mathlab Graphing Calculator App <h3>Graphing Calculator Apps – The End of an Era</h3> So, do graphing calculator apps mean the end of the <a href="http://www.sellyourcalculators.com/">graphing calculator</a> era. Not likely. College admissions exams and school stipulations will see to it that graphing calculators are not going by the wayside in the near future. They are, however, making it easier for students with limited need for <a href="http://www.sellyourcalculators.com/">graphing calculator</a> functionality to perform math functions without the need of a graphing calculator. If you have a graphing calculator that is being replaced by one of these great graphing calculator apps, consider re-cooping some of your cost by selling your graphing calculator back to a buyback program like the one at <a href="http://www.sellyourcalculators.com/">sellyourcalculators.com</a>. Downloading Graphing Calculator Games http://www.sellyourcalculators.com/blog/downloading-graphing-calculator-games http://www.sellyourcalculators.com/rss/downloading-graphing-calculator-games Your Calculator Seling Site Tue, 11 Jun 2013 15:30:00 -0500 <h1>Graphing Calculator Games</h1> A variety of <a href="http://www.sellyourcalculators.com">graphing calculator</a> games exist that can easily be downloaded. Programmers have created arcade games, board games, strategy games, educational games and many more to add to the functionality and excitement of your graphing calculator. Don’t get stuck in those monotonous classes with nothing to do. Graphing calculator games provide hours of entertainment with little to no technical skills required to install them. <h2>Steps to Download Graphing Calculator Games</h2> Downloading graphing calculator games is not a difficult task. In a matter of minutes, you will be playing your favorite games. 1)      Download and install the software that allows you to transfer games to your graphing calculator. 2)      Find graphing calculator games online – check out sites like <a href="http://www.ticalc.org">www.ticalc.org</a>, <a href="http://www.education.ti.com/">http://www.education.ti.com</a> or <a href="http://www.calcgames.org/">http://www.calcgames.org/</a> for a multitude of games. 3)      Extract the package. 4)      Connect your calculator to your PC using the <a href="http://www.buyyourcalculators.com/Cables">USB cable</a> that came with your calculator. Windows might ask you to install a new hardware device. Insert the CD that came with your calculator in you CD/DVD-ROM and press next. 5)      Open the Ti connect application and go to Ti device explorer. 6)      Wait for the software to find your calculator. 7)      When prompted, select the appropriate USB. 8)      Drag the file you extracted from the file you downloaded  (usually a .8xk but it may have another extension), Your game is the one with the calculator icon on it. 9)      Wait until the transfer is finished. 10)   Disconnect your calculator from the computer and close Ti connect. 11)   Delete the game files now, you will not need them anymore. 12)   Press the [APPS] button on your calculator and your game will be listed. Now, you’re ready to play. Have fun. <h3>Equipment for Downloading Graphing Calculator Games</h3> Downloading graphing calculator games requires a few pieces of a equipment 1)      If you are downloading to a TI-83, TI-83 Plus or TI-83 Plus Silver Edition, you will need a <a href="http://www.buyyourcalculators.com/Cables/TI-83TI-83PlusSilverTI-86TI-89DataLinkCable">SilverLink cable</a>. 2)      TI-84, TI-84 Plus or TI-84 Plus Silver Edition require only a <a href="http://www.buyyourcalculators.com/Cables">mini USB cable</a>. 3)      <a href="http://www.buyyourcalculators.com/graphing-calculators-CD-manuals">CD/DVD ROM</a> that came with your calculator – may be required if using Windows and it asks you to install “new hardware” when you connect your USB cable. If you’ve got an older graphing calculator that does not have this technology available, consider participating in a <a href="http://www.sellyourcalculators.com/">buyback program</a> to earn money towards your new graphing calculator. Contact <a href="https://my.scribecontent.com/optimizer/www.sellyourcalculators.com">www.sellyourcalculators.com</a> to find out what your old graphing calculator is worth. What to do with my Used Graphing Calculators http://www.sellyourcalculators.com/blog/what-to-do-with-my-used-graphing-calculators http://www.sellyourcalculators.com/rss/what-to-do-with-my-used-graphing-calculators Your Calculator Seling Site Fri, 26 Apr 2013 09:02:00 -0500 <h1>Options for Getting Rid of Your Used Graphing Calculators</h1> <img style="float: left; margin: 5px;" title="HP 48GX used calculator" src="http://www.sellyourcalculators.com/images/calcs/5.jpg" alt="HP 48GX used calculator" width="194" height="259" />With the end of the school year fast approaching, many students start contemplating what to do with their used graphing calculators. Perhaps you are uncertain whether you will have a continued need for a graphing calculator or you just don’t want the clutter. Another factor in your decision may be you’re your technology is outdated. Regardless of your reason, now is the perfect time to consider your options. <h2>Used Graphing Calculators BuyBack Programs</h2> If you are new to the Math and Science world and were required to purchase that expensive, latest model graphing calculator for a single class, you’re in luck. You have to option to re-sell your used calculator for cash. Sites like <a href="http://www.SellYouCalculators.com">www.SellYouCalculators.com</a> will buy your calculator back and put cash in your pocket. This is an excellent option, especially if you are on a limited student budget or simply want to re-coop some of your initial expense. These online buyback programs are designed to make it easy for you to collect money for your used calculator. You simply visit the site, select which calculator you have and its condition, request a quote and send it on its way (usually free shipping). Once received, the company will verify the make/model and condition and send you the funds based on your specifications. <h3>Selling a Used Calculator for the Do It Yourselfer</h3> Garage sale, ebay, Craigslist or other selling sites are another option for getting rid of that used calculator. Garage sales are generally frequented by people looking for bargains, so pricing is of the utmost importance when using this method. Ebay may be a viable option if you are not set on a getting a specific price, but would rather just see your used calculator find a new home. Craiglist is also an option for those who don’t want to put forth the effort or don’t have enough items to have a garage sale.  A few things to consider when using these methods: 1) screen buyers by only offering an email address for contact when dealing with online methods, 2) if meeting a potential buyer, agree to meet in a public place rather than a private residence and 3) collect payment before shipping your item out. While these may seem like common sense, people can be very convincing especially when a person is eager to sell. While you may get a little more bank for your buck, you will have to put in more time and effort than going through a buyback program as previously mentioned. <h3>Using your Used Graphing Calculator for a Charitable Contribution</h3> A third option would be to donate the calculator to your school’s science or math department or similar programs to help students who don’t have the financial means to afford a new or slightly used graphing calculator. Making contributions to an approved charitable organization like schools, Salvation Army, Red Cross or Goodwill can also serve as a tax write off. This option doesn’t put cash in your hands immediately, but can help at tax time. Just remember to get a receipt from the organization that you are donating to, so that you can show proof of your contribution for tax purposes. This can be extremely rewarding, especially knowing that you might be helping the next Albert Einstein get his start. There are many options for getting rid of your used calculator. In most cases, you will receive some compensation for your used graphing calculator even if it is not in excellent condition. If you have questions about selling your used calculator or valuation, please contact<a href="http://www.SellYourCalculators.com">www.SellYourCalculators.com</a> today. Using the TI-83 Plus Calculator http://www.sellyourcalculators.com/blog/using-the-ti-83-plus-calculator http://www.sellyourcalculators.com/rss/using-the-ti-83-plus-calculator Your Calculator Seling Site Tue, 26 Mar 2013 11:25:00 -0500 <h1>TI-83 Plus Calculator Functionality</h1> The TI-83 Plus is one of the most popular graphing calculators for students because of its functionality. In addition to the standard scientific functions, the TI-83 Plus offers graphing, polar/parametric/sequence graphing modes, statistics, trigonometric, and algebraic functions and some calculus functions. It can also be used for basic math purposes. <h2>TI-83 Plus Basic Operating Tips</h2> The TI-83 Plus is an extremely user-friendly calculator that offers extensive functionality. The keyboard on the TI-83 Plus is broken into 4 main sections: graphing keys, editing keys, advanced function keys and scientific calculator keys. Each of these areas allows you to input, edit and extrapolate data. The y and f keys allow users to access the secondary functions and alpha functions. The yellow text printed above each button shows the secondary function associated with that button. While the green text above each button represents the alpha function. To access these functions, users simply press the y or f key and then the corresponding button containing the desired function. Turning the TI-83 Plus off may not be apparent to the first time user. In order to turn off the calculator, the user must push the Yellow [2nd ] key located at the top of the first column and then the [ON] button. This calculator does have a built in timer that turns the calculator off after 5 minutes of inactivity. Upon turning the calculator on again, the user is taken to the Home Screen. In order to return to the Home Screen at any time, the user must push the [2nd ] key and [QUIT]. It is important to note that the order of operations is already programmed into the calculator. Parentheses take priority and can be used to ensure that the problem is solved correctly. <h2>TI-83 Plus Display Settings</h2> The contrast of the TI-83 Plus screen can be adjusted as needed based on the viewing angle and lighting conditions. These settings will be retained in memory when the calculator is turned off.  Pressing the &dagger; button will lighten the screen and the } button will darken the screen. To adjust the contrast, follow these steps: 1. Press and release the y key. 2. Press and hold &dagger;or }, which are below and above the contrast symbol (yellow, half- shaded circle). <h2>TI-83 Plus Advanced and Editing Keys</h2> | or ~ moves the cursor within an expression; these keys repeat. } or &dagger; moves the cursor from line to line within an expression that occupies more than one line; these keys repeat. } moves the cursor to the beginning of the expression from on the top line of an expression on the home screen, } moves the cursor to the beginning  of the expression. On the bottom line of an expression on the home screen, &dagger;.  moves the cursor to the end of the expression y| moves the cursor to the beginning of an expression y~ moves the cursor to the end of an expression Í evaluates an expression or executes an instruction ‘ on a line with text on the home  screen, clears the current line . on a blank line on the home screen, clears everything on the home screen . in an editor, clears the expression or value where the cursor is located; it does not store a zero. { deletes a character at the cursor; this key repeats. Y [INS] changes the cursor to an underline (__); inserts characters in front of the underline cursor; to end insertion, press y[INS] or press }, |, &dagger;, or ~. y changes the cursor to Þ ; the next keystroke performs a 2nd operation (an operation in yellow above a key and to the left); to cancel 2nd, press y again. &fnof; Changes the cursor to Ø; the next keystroke pastes an alpha character (a character in green above a key and to the right); to cancel ., press &fnof; or press }, |, &dagger;, or ~ y[A-LOCK]Changes the cursor to Ø ; sets alpha-lock; subsequent keystrokes (on an alpha key) paste alpha characters; to cancel alpha-lock, press &fnof;.  yÍ displays the last operation performed. The above tips provide basic information for the general operation of the TI-83 Plus calculator. These shortcuts will make calculations more efficient and use of the calculator more enjoyable. If you are in need of a TI-83 Plus or other Texas Instrument Calculator, please visit <a href="http://www.buyyourcalculators.com">www.buyyourcalculators.com</a>. If  you have a TI-83 Plus you no longer need, you can sell your calculator and get some cash back by visiting <a href="http://www.sellyourcalculators.com">www.sellyourcalculators.com</a>. TI Nspire Tips and Tricks http://www.sellyourcalculators.com/blog/ti-nspire-tips-and-tricks http://www.sellyourcalculators.com/rss/ti-nspire-tips-and-tricks Your Calculator Seling Site Tue, 05 Mar 2013 14:43:00 -0600 <h1>TI Nspire Handheld Calculators</h1> The Ti Nspire Handheld Calculator is a revolutionary graphing calculator that provides students with practical examples and experiences to enhance the learning process. These graphing calculators also enable users to create and transfer files easily using Mac OS X or Windows compatible software. The larger, higher resolution screen enables students to draw more detailed graphs. This calculator also comes with the ability to calculate algebraic equations using the TI Nspire CAS version. Outlined below are a few tips and tricks for using your TI Nspire graphing calculator. <h2>Modifying Your TI- Nspire Display</h2> <ul> <li>Increase contrast: Ctrl-+</li> <li>Decrease contrast: Ctrl-–</li> <li>Power off: Ctrl-On</li> </ul> <h2>Shortcuts for Managing Your TI Nspire Documents</h2> These shortcuts are for the files (documents) that hold problems. <ul> <li>Access the Documents menu: Doc</li> <li>Access the Context menu (right-click): Ctrl-Menu</li> <li>Open Document: Ctrl-O</li> <li>Close Document: Ctrl-W</li> <li>Create New Document: Ctrl-N</li> <li>Insert New Page: Ctrl-I</li> <li>Select Application: Ctrl-K</li> <li>Save Current Document: Ctrl-S</li> </ul> <h2>Navigating Your TI-Nspire Documents</h2> These shortcuts enable you to easily navigate documents on your TI-Nspire. You can change your view, move from problem to problem, page to page and application to application. <ul> <li>Display previous page: Ctrl-◄</li> <li>Display next page: Ctrl-►</li> <li>Switch between applications on a split page: Ctrl-Tab</li> <li>Display page sorter view: Ctrl-▲</li> <li>Move through the fields in a dialog box: Tab</li> <li>Move through the fields in reverse order: Shift-Tab</li> </ul> <h2>TI Nspire Keyboard Tips and Tricks</h2> <ul> <li>To enter π, type pi.</li> <li>To enter θ, type theta.</li> <li>To enter ∞: type infinity.</li> <li>To enter ≤, type <=.</li> <li>To enter ≥, type >=.</li> <li>To enter √, type sqrt(...).</li> <li>To enter ǁ, type abs(...).</li> <li>To enter i (the imaginary constant), type @i.</li> <li>To enter e (natural log base e), type @e.</li> <li>To enter ° (degrees), type @d.</li> <li>To enter r (radians), type @r.</li> </ul> Hopefully, you will find these shortcuts valuable tools when using your TI Nspire handheld graphing calculator. Using Graphing Calculators on the SAT & ACT http://www.sellyourcalculators.com/blog/using-graphing-calculators-on-the-sat-act http://www.sellyourcalculators.com/rss/using-graphing-calculators-on-the-sat-act Your Calculator Seling Site Fri, 08 Feb 2013 15:24:00 -0600 <h1>Using Graphing Calculators on the SAT & ACT is Permitted with Exceptions</h1> Students taking the SAT and ACT tests are permitted to use graphing calculators, scientific calculators and basic four function calculators. There are restrictions on the use of graphing calculators, however.  Calculators are only allowed to be used during the Mathematics portion of the exams. The remainder of testing is to be completed without a calculator. During these other exams, calculators must be turned off and put away. <h2>Permitted Calculators</h2> SAT Permitted Graphing Calculators Casio: FX-6000 series, FX-6200 series, FX-6300 series, FX-6500 series, FX-7000 series, FX-7300 series, FX-7400 series, FX-7500 series, FX-7700 series, FX-7800 series, FX-8000 series, FX-8500 series, FX-8700 series, FX-8800 series, FX-9700 series, FX-9750 series, FX-9860 series, CFX-9800 series, CFX-9850 series, CFX-9950 series, CFX-9970 series, FX 1.0 series, Algebra FX 2.0 series, FX-CG-10 (PRIZM), FX-CG-20 Hewlett-Packard: HP-9G, HP-28 series, HP-38G, HP-39 series, HP-40 series, HP-48 series, HP-49 series, HP-50 series Radio Shack: EC-4033, EC-4034, EC-4037 Sharp: EL-5200, EL-9200 series, EL-9300 series, EL-9600 series*, EL-9900 series Texas Instruments: TI-73, TI-80, TI-81, TI-82, TI-83/TI-83 Plus, TI-83 Plus Silver, TI-84 Plus TI-84 Plus Silver, TI-85, TI-86, TI-89, TI-89 Titanium, TI-Nspire/TI-Nspire CX, TI-Nspire CAS/TI-Nspire CX CAS, TI-Nspire CM-C, TI-Nspire CAS CX-C Other: Datexx DS-883, Micronta, Smart2 <h2>Prohibited Calculators</h2> The following calculators are prohibited from use during the SAT and ACT test: <ul> <li>Calculators with built-in CAS (Computer Algebra Systems) are prohibited on the ACT but not the SAT</li> </ul> Calculators within this category include Texas Instruments: All model numbers that begin with TI-89 or TI-92 and the TI-Nspire CAS—Note: The TI-Nspire (non-CAS) is permitted, Hewlett-Packard: HP 48GII and all model numbers that begin with HP 40G, HP 49G, or HP 50G & Casio: Algebra fx 2.0, ClassPad 300 and ClassPad 330, and all model numbers that begin with CFX-9970G <ul> <li>Handheld, tablet or laptop computers including PDA’s</li> <li>Calculators with QWERTY keyboards – non-QWERTY keypads are acceptable</li> <li>Cell phone calculators</li> <li>Calculators that make noise, require electrical cords or have paper tape</li> <li>Calculators with electronic writing pads or pen-input/stylus devices</li> </ul> Some other things to keep in mind if you are going to be using a graphing calculator on the SAT or ACT tests: <ul> <li>Make sure your calculator has good batteries</li> <li>Take a back up calculator </li> <li>Remove all power cords</li> </ul> If you are going to be taking the SAT or ACT and need a graphing calculator or scientific calculator, visit <a href="http://www.buyyourcalculators.com">www.buyyourcalculators.com</a>. If you’ve already taken the test, you can sell you calculator and get some cash by visiting <a href="http://www.sellyourcalculators.com">www.sellyourcalculators.com</a>. 1 test news http://www.sellyourcalculators.com/blog/1-test-news http://www.sellyourcalculators.com/rss/1-test-news Your Calculator Seling Site Wed, 30 Jan 2013 22:05:00 -0600 test news item. this is only a test