Basic Math Operations - Calculated Industries 4225 Pocket Reference Manual

BASIC MATH OPERATIONS

Your calculator uses standard chaining
logic, which simply means that you enter
your first value, the operator (+, –, x,
÷), the second value and then the Equals
sign (=).
3
A.
3
B.
3
C.
3
D.
This feature also makes the calculator
simple to use for dimensional applications:
Adding and Subtracting Strings of
Dimensions
Add the following measurements:
• 6 Feet 2-1/2 Inches
• 11 Feet 5-1/4 Inches
• 18.25 Inches
Then subtract 2-1/8 Inches.
KEYSTROKE
6 f 2 i 1 / 2 +
1 1 f 5 i 1 / 4 +
1 8 • 2 5 i =
– 2 i 1 / 8 = 18
Multiplying Dimensions
Multiply 5 Feet 3 Inches by 11 Feet 6-1/2
Inches:
KEYSTROKE
5 f 3 i x 1 1 f
6 i 1 / 2 =
P
+ 2
– 2
x 2
÷ 2
R
OCKET EFERENCE
=
5.
=
1.
=
6.
=
1.5
19
FEET
11-7/8
FEET
60.59375
G — 16
UIDE
DISPLAY
2
INCH
INCH
DISPLAY
SQ FEET