June 2013
Intermediate to advanced
336 pages
6h 43m
English
Content preview from Ti-84 Plus Graphing Calculator For Dummies, 2nd Edition
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Chapter 25
Ten Common Errors
In This Chapter
Incorrectly negating numbers
Improperly indicating the order of operations
Forgetting you’re in Radian mode
Accidentally deleting a list or a function
Even the best calculating machine is only as good as its input. This chapter identifies ten common errors made when using the calculator. Wouldn’t it be great to avoid some of the common errors that normally plague students who are using calculators?
Using - Instead of _ to Indicate That a Number Is Negative
If you press - instead of _ at the beginning of an entry, the calculator assumes you want to subtract what comes after the minus sign from the previous answer. If you use - instead of _ in the interior of an expression to denote a negative number, the calculator responds with the ERROR: SYNTAX error message.
Indicating the Order of Operations Incorrectly by Using Parentheses
When evaluating expressions, the order of operations is crucial. To the calculator, for example, –32 equals –9. This may come as quite a surprise to someone expecting to square –3, where (–3)2 equals 9. The calculator ...
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