Q16 of 123 Page 3

Mark the correct alternative in each of the following:

Subtraction of integers is


1) NOT Commutative:


⇒ a * b = a - b …(1)


⇒ b * a = b - a …(2)


⇒ a * b ≠ b * a


2) NOT Associative:


⇒ (a * b)* c = (a - b) * c


(a - b) * c = (a - b) - c


(a - b) * c = a – b - c


⇒ a * (b * c) = a * (b - c)


a * (b - c) = a – (b - c)


a * (b - c) = a – b + c


⇒ (a * b)* c ≠ a * (b * c)

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