exercise 1.1 class 8

Question 1:

Name the property under multiplication used in each of the following:

(i) \(\displaystyle {-4 \over 5} × 1 = 1 × {-4 \over 5}={-4 \over 5} \)

(ii)\(\displaystyle {-13 \over 17} × {-2 \over 7}={-2 \over 7} × {-13 \over 17} \)

(iii)\(\displaystyle {-19 \over 29} × {29 \over -19} =1\)

Answer:

(i)Multiplicative identity.

(ii) Commutativity

(iii) Multiplicative inverse

Question 2:

Tell what property allows you to compute \(\displaystyle {1 \over 3}×(6×{4 \over 3})\) as \(\displaystyle {1 \over 3}×6)×{4 \over 3}\) .

Answer:

Associativity

Question 3:

The product of two rational numbers is always a __________.

Answer:

Rational number