Casio fx-991ES PLUS User Manual

Using Memory Functions
Answer Memory (Ans)
The last calculation result obtained is stored in Ans (answer) memory.
Ans memory contents are updated whenever a new calculation result is
displayed.
Answer Memory contents are updated whenever you execute a calculation
using any one of the following keys:
, , , (M-), ,
(STO).
Answer Memory can hold up to 15 digits.
Example 1: To divide the result of 3 × 4 by 30 (LineIO)
3 4 12
(Continuing) 30
Example 2: To perform the calculations shown below:
123 456 579
(Continuing) 789
Variables (A, B, C, D, E, F, M, X, Y)
Your calculator has nine preset variables named A, B, C, D, E, F, M, X,
and Y.
You can assign values to variables and use the variables in calculations.
Example:
To assign the result of 3 + 5 to variable A
3 5 (STO) (A) 8
To multiply the contents of variable A by 10
(Continuing) (A) 10 80
25

Casio fx-991ES PLUS Specifications

General

Type	Scientific
Cover	No
Form factor	Desktop
Control type	Buttons
Product color	Gray
Digits	15 digits
Display type	Dot-matrix
Display resolution	96 x 31 pixels
Display number of lines	10 lines
Storage media type	Not available
Battery life	3 year(s)
Battery type	LR44
Power source	Battery/Solar
Number of batteries supported	1
Symbolic notation	Square root
Conversion between	Decimal, Fraction, Percent
Convert angles from degrees to	Gradian, Radian
Random number/integer generator	Yes

Weight and Dimensions

Depth	162 mm
Width	80 mm
Height	11.1 mm
Weight	95 g