Exercise 1.1

1. Name the property under multiplication used in each of the following.

(i) −45×1 = 1×−45 = −45 : Multiplicative identityAdditive Identity.

(ii) −1317 × −27 = −27 × −1317 : Commutativity PropertyAssociative Property

(iii) −1929 × 29−19 = 1 : Multiplicative InverseAdditive Inverse.

2. Tell what property allows you to compute 13 × (6×43) as (13×6) × 43

It is in the form of a × (b×c) = (a×b) × c.

Hence, it is Property.

3. The product of two rational numbers is always a RationalIrrational Number.