Casio FX-991ES User Guide - Page 22

Basic Calculations - fraction to decimal

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• If a term is encountered during the calculation cannot be displayed as a root (') form or a fraction, the calculation result is displayed in decimal form. Example: log3 + '2 = 1.891334817 Basic Calculations (COMP) This section explains how to perform arithmetic, fraction, percent, and sexagesimal calculations. All calculations in this section are performed in the COMP Mode (N1). k Arithmetic Calculations Use the +, -, *, and / keys to perform arithmetic calculations. Example: 7 × 8 - 4 × 5 = 36 LINE 7*8-4*5= • The calculator automatically judges the calculation priority sequence. For more information, see "Calculation Priority Sequence". Number of Decimal Places and Number of Significant Digits You can specify a fixed number of decimal places and significant digits for the calculation result. Example: 1 ÷ 6 = LINE Initial default setting (Norm1) FIX 3 decimal places (Fix3) SCI 3 significant digits (Sci3) • For more information, see "Specifying the Number of Display Digits". E-20

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E-20
•
If a term is encountered during the calculation cannot be displayed
as a root (
'
) form or a fraction, the calculation result is displayed
in decimal form.
Example: log3 +
'
2 = 1.891334817
Basic Calculations
(COMP)
This section explains how to perform arithmetic, fraction, percent,
and sexagesimal calculations.
All calculations in this section are performed in the COMP Mode
(
N
1
).
k
Arithmetic Calculations
Use the
+
,
-
,
*
, and
/
keys to perform arithmetic calculations.
Example:
7
×
8 – 4
×
5 = 36
LINE
7*8-4*5=
• The calculator automatically judges the calculation priority
sequence. For more information, see “Calculation Priority
Sequence”.
Number of Decimal Places and Number of
Significant Digits
You can specify a fixed number of decimal places and significant
digits for the calculation result.
Example:
1
÷
6 =
LINE
Initial default setting (Norm1)
3 decimal places (Fix3)
FIX
3 significant digits (Sci3)
SCI
•
For more information, see “Specifying the Number of Display Digits”.