Casio fx-991ZA PLUS II User Manual

Basic Calculations
Use the
key to enter the COMP Mode when you want to perform
basic calculations.
(COMP)
Toggling Calculation Results
While Natural Display is selected, each press of
will toggle the
currently displayed calculation result between its fraction form and decimal
form, its √ form and decimal form, or its π form and decimal form.
Example 1: π ÷ 6 =
1
6
π = 0,5235987756 (MthIO-MathO)
(π)
6
1
6
π 0,5235987756
Example 2: (√2 + 2) × √3 = √6 + 2√3 = 5,913591358 (MthIO-MathO)
2 2 3
√6 + 2√3 5,913591358
While Linear Display is selected, each press of will toggle the
currently displayed calculation result between its decimal form and fraction
form.
Example 3: 1 ÷ 5 = 0,2 =
1
5
(LineIO)
1 5
0,2 1 5
Example 4: 1 -
4
5
=
1
5
= 0,2 (LineIO)
1 4 5
1 5 0,2
20

Casio fx-991ZA PLUS II Specifications

General

Type	Scientific Calculator
Number of Functions	552
Equation Solver	Yes
Matrix Calculations	Yes
Complex Number Calculations	Yes
Integration	Yes
Differentiation	Yes
Memory	9 variables
Weight	95 g
Protective Case	Yes
Display	Natural Textbook Display
Power Source	Solar and Battery