What are the parentheses for on a Casio Scientific calculator?

Generally, parentheses on scientific calculators are used to change the order of operations or to clarify the order of operations. All calculators do not respond in exactly in the same way, but these examples will give you some ideas about when you should consider parentheses. My advice to students is, when in doubt, use parentheses. . Ex 1: 3*5+3 = 18, but 3*(5+3) = 24 Ex 2: 20 + 4 + 8/2 = 28, but 20 + (4+8)/2 = 26 Ex 3: e 2 + 3 = 10.389, but e(2+3) = 148.41 Ex 4: log 100 + 3 = 5, but log ( 100 +3) = 2.01 Ex 5: log 100 + 10 = 102, but log (100 + 10) = 4.08 Be careful of this last one. On some calculators, for example the TI-83 Plus, the expression log (100 + 10) is treated as squaring the result of the operation. You'll get 4.16 for an answer. To square only the argument on that calculator, you'll need to enter this: log ((100 + 10)). When you're uncertain, the safe thing to do is to try a simple problem and see if you get the right answer.  more