(Note: where do you find p? It's in yellow: you get it by hitting 2nd and then ^.) (Hey, it could happen.) You need to add one to it, you need to double it, all kinds of things.and you don't want to keep typing it! So you type: Suppose that, for some reason, the number (5)*( p-2) keeps showing up in your calculations. Using the key, you can put a number into memory E. OK, but what is an E anyway? It is a named memory space.
Hit the green button labeled ALPHA and then hit this key, and you get: Hit the yellow button labeled 2nd and then hit this key, and you get: This key can be used for three separate functions: the one written in white on the key, the one written in yellow above the key, and the one written in green above the key. See below for an explanation of the distinction.Ī typical key on the calculator looks like this: That may seem like an odd way to begin a tutorial, but in my experience, that specific problemfailure to parenthesize multiplied terms in the denominatorleads to more problems than anything else I've seen.īy the way, another easy way to mess up this particular calculation is to confuse the two minus keys: both must be used in the correct places. You need to parenthesize the denominator as well, as follows: Since division and multiplication are at the same level in the order of operations, the calculator will group them left to right: first it will divide by 2, and then it will multiply by 2. Given all that care, you might be very surprised when you hit ENTER and got the wrong answer. One set of parentheses holds everything inside the square root, and the outer set holds the entire numerator of the fraction. So you, being vigilant and careful about parentheses, would naturally type: (-10+ (10 2-4*2*12))/2*2. Suppose you are solving a quadratic equation, and you want to enter this equation: Here's where this can get you into trouble. So it comes up with the correct answer, 8. The calculator knows that you intend to multiply the 3 by the log (although you never said so explicitly) and it knows that it should perform the log first, then the multiplication and division, and finally the addition. For instance, you can type 5-3log(100)/2 and hit ENTER. In almost all cases, you can type something the way that you would write it. The beauty, and the danger, of these calculators, is that they respect order of operations completely.
Of course, as you're reading, you should actually do this stuff on your calculator! Even veteran TI users sometimes get confused about order of operations issues, or don't know about wonderfully useful keys such as ANS, and this may really help. But if you are used to calculators other than this model of TI, this is the right place to start.
#DEGREE MODE IN MAGIC CALCULATOR HOW TO#
You need explanations of how to do simple math operations, how to turn it on and off, how to use the ENTER key, and how to use CLEAR or DEL, and I'm not providing any of that.
If you've never used a calculator before, and you're not terribly comfortable playing around with new technology, this will not be basic enough for you. The phrase "the basics" is a bit misleading here. In general, you almost always type equations the same way you would write them. But with a graphing calculator, you type (2). For instance, if you want to find the square root of 2 on an older calculator, you hit 2 and then. The TI-83, 83+, 84, and 84+ are "graphing calculators." This means they can graph, but it also means a good deal more than that: they work very differently from older, "scientific" calculators. The TI-89 and TI-92 are significantly different, and this guide probably won't be much use for them. (The TI stands for Texas Instruments.) The TI-83 "Plus", TI-84, and TI-84 "Plus" are almost identical, so this guide will serve just as well for them. To the left is a picture of a TI-83 calculator. Felder's Guide to the TI-83, TI-83+, and TI-84 TI-83, TI-83+, TI-84 Graphing Calculator Quick Reference
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