Question

Which of the following is an example of commutative law ?

• A.
  $3\times 12$
• B.
  5 + 25
• C.
  <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> $36÷5$
• D.
  32 - 4

Answer 1

Answer: (A), (B)

The correct options are
A
$3\times 12$
B

5 + 25
We know that commutative property of intergers is followed only in addition and multiplication.
$a+b=b+a$ and
$a\times b=b\times a$, where a and b are integers.

In case of division and subtraction of integers, commutative property is invalid.
$a-b\ne b-a$ and
$a÷b\ne b÷a$

Therefore, option a and b is correct and option c and d is incorrect.