Question

Which of these operations is commutative for integers?

• A. Addition
• B. Subtraction
• C. Multiplication
• D. Division

Answer 1

Answer: (A), (C)

The correct options are
A

Addition

C

Multiplication

Addition and multiplication are commutative for integers.

If $a$ and $b$ are integers, then
$a+b=b+a$
$a\times b=b\times a$

On the other hand, subtraction and division are not commutative for integers.

If $a$ and $b$ are integers, then
$a-b\ne b-a$
$a÷b\ne b÷a$