Question

If a and b are two whole numbers, then commutative law is applicable to subtraction if and only if

• A. a > b
• B. a < b
• C. a = b
• D. a $\ne$b

Answer 1

The correct option is C a = b

We know that subtraction of whole numbers is not commutative, that a - b is not equal to b - a.

Now if, a = b = 3, a - b = b - a = 0

So, commutative property is applicable to subtraction if and only if a = b.

So, option 'c' is correct.