Casio fx-991ES PLUS User Manual

3. Remove the battery, and then load a new battery with its plus (+) and
minus (-) ends facing correctly.
4. Replace the cover.
5. Initialize the calculator: (CLR) (All) (Yes).
• Do not skip the above step!
Calculation Priority Sequence
The priority sequence of input calculations is evaluated in accordance with
the rules below.
When the priority of two expressions is the same, the calculation is
performed from left to right.
1 Parenthetical expressions
2
Functions that require an argument to the right and a closing
parenthesis ")" following the argument
3
Functions that come after the input value (x
2
, x
3
, x
-1
, x!, °’ ”, °,
r
,
g
, %, t), powers ( ), roots ( )
4 Fractions
5
Negative sign ((-)), base-n symbols (d, h, b, o)
6
Metric conversion commands (cm in, etc.), STAT Mode
estimated values (xˆ, yˆ, xˆ
1
, xˆ
2
)
7 Multiplication where the multiplication sign is omitted
75

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