Four-function calculator
A four-function calculator is a calculator that can perform basic operations such as addition, subtraction, multiplication and division. Such calculator can also have functions such as the square root and the exponent.
Basic operations using a four-function calculator
Addition : 60 + 32.5
Just hit the following buttons in the order given.
six → zero →add →three →two →decimal point →five→equals.
The display will show 92.5.
Subtraction : 21 - 40
Just hit the following buttons in the order given.
two → one →subtract → four → zero → equals.
The display will show -19.
Subtraction : -8 + 6
Just hit the following buttons in the order given.
eight → change sign → plus → six → equals.
The display will show -2
Subtraction : 10 - (- 6)
Just hit the following buttons in the order given.
one→ zero→ subtract→ 6→ change sign → equals.
The display will show 16
Multiplication : 9 × 7
Just hit the following buttons in the order given.
nine → multiply → seven → equals.
The display will show 63
Division : -20 ÷ -5
Just hit the following buttons in the order given.
two → zero → change sign→ divide → five → change sign → equals
The display will show 4
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