Approximate Weight:

fx-570ES PLUS: 100 g (3.5 oz) including the battery

fx-991ES PLUS: 95 g (3.4 oz) including the battery

Frequently Asked Questions

IHow can I perform input and display results the same way I did on a model that does not have Natural Textbook Display?

Perform the following key operation: (SETUP)(LineIO). See “Configuring the Calculator Setup” on page E-5 for more information.

IHow can I change a fraction format result to decimal format?

How can I change a fraction format result produced by a division operation to decimal format?

See “Toggling Calculation Results” on page E-9 for the procedure.

IWhat is the difference between Ans memory, independent memory, and variable memory?

Each of these types of memory acts like “containers” for temporary storage of a single value.

Ans Memory: Stores the result of the last calculation performed. Use this memory to carry the result of one calculation on to the next. Independent Memory: Use this memory to totalize the results of multiple calculations.

Variables: This memory is helpful when you need to uses the same value multiple times in one or more calculations.

IWhat is the key operation to take me from the STAT Mode or TABLE

Mode to a mode where I can perform arithmetic calculations? Press (COMP).

IHow can I return the calculator to its initial default settings? Perform the following operation: (CLR)(Setup)(Yes)

IWhen I execute a function calculation, why do I get a calculation result that is completely different from older CASIO calculator models? With a Natural Textbook Display model, the argument of a function that uses parentheses must be followed by a closing parenthesis. Failing to press after the argument to close the parentheses may cause unwanted values or expressions to be included as part of the argument.

Example: (sin 30) + 15 B

Q30 15  15.5

Older (S-VPAM) Model:

Natural Textbook Display Model: 1 Q30 15  15.5

Failure to press here as shown below will result in calculation of sin 45.

Q30 15  0.7071067812

E-43