2-1
Chapter 2
Manual Calculations
1. Basic Calculations
I
Arithmetic Calculations
• Enter arithmetic calculations as they are written, from left to right.
• Use the
key to input the minus sign before a negative value.
• Calculations are performed internally with a 15-digit mantissa. The result is rounded to a 10-
digit mantissa before it is displayed.
• For mixed arithmetic calculations, multiplication and division are given priority over addition
and subtraction.
Example
Operation
56 × (–12) ÷ (–2.5) = 268.8
56
12
2.5
U
(2 + 3) × 10
2
= 500
2
3
1
$
2
U
2 + 3 × (4 + 5) = 29
2
3
4
5
U
*
1
4 × 5
6
= 0.3
6
4
5
U
*
1
Final closed parentheses (immediately before operation of the
U
key) may be omitted, no
matter how many are required.
I
Number of Decimal Places, Number of Significant Digits, Normal
Display Range
[SET UP]
-
[Display]
-
[Fix] / [Sci] / [Norm]
• Even after you specify the number of decimal places or the number of significant digits,
internal calculations are still performed using a 15-digit mantissa, and displayed values are
stored with a 10-digit mantissa. Use Rnd of the Numeric Calculation Menu (NUM) (page
2-12) to round the displayed value off to the number of decimal place and significant digit
settings.
• Number of decimal place (Fix) and significant digit (Sci) settings normally remain in effect
until you change them or until you change the normal display range (Norm) setting.
Example 1
100
w
6 = 16.66666666...
Condition
Operation
Display
100
6
U
16.66666667
4 decimal places
K
(SET UP)
DD
(Fix)
C
U)U
16.6667
5 significant digits
K
(SET UP)
DD
(Sci)
D
U)U
1.6667
E
+01
Cancels specification
K
(SET UP)
DD
(Norm)
)U
16.66666667
*
1
Displayed values are rounded off to the place you specify.
*
1
*
1
*
1
*
1
2
Summary of Contents for FX-7400GII
Page 337: ...E CON2 Application ...
