Basic calculations, Fraction calculations – Casio fx-991ES PLUS User Manual
Page 11
E-10
P ÷ 6 = 1
6
= 0.5235987756
(P) 6
1
6
f
0.5235987756
(
'
2 + 2) s
'
3 =
'
6 + 2
'
3 = 5.913591358
'
6 + 2
'
3
f
5.913591358
While Linear Display is selected, each press of
5 will toggle the currently
displayed calculation result between its decimal form and fraction form.
1 ÷ 5 = 0.2 = 1
5
1
1
5
0.2
f
1
Y
5
1
–
4
5
= 1
5
= 0.2
1
1
4 5
1
Y
5
f
0.2
Important: • Depending on the type of calculation result that is on the display
when you press the
5 key, the conversion process may take some time
to perform. • With certain calculation results, pressing the
5 key will not
convert the displayed value.
Note: With Natural Display, pressing
instead of after inputting
a calculation will display the calculation result in decimal form. Pressing
5
after that will switch to the fraction form or
P form of the calculation result.
The
form of the result will not appear in this case.
Basic Calculations
Fraction Calculations
Note that the input method for fractions is different, depending upon whether
you are using Natural Display or Linear Display.
2 + 1 = 7
3 2 6
2
3 C 1 2
7
6
or
2 A 3 C 1 A 2
7
6
1 2
3 1 2
7
Y6
1 = 1
2 2
4 − 3
4
() 3 C 1 A 2
1
2
1 4
3 1 2
1
Y2
Note: • Mixing fractions and decimal values in a calculation while Linear
Display is selected will cause the result to be displayed as a decimal value.
• Fractions in calculation results are displayed after being reduced to their
lowest terms.
To switch a calculation result between improper fraction and mixed
fraction format: Perform the following key operation:
5()
To switch a calculation result between fraction and decimal format:
Press
5.