RS Aggarwal Class 8 Math First Chapter Rational Numbers Exercise 1E Solution

EXERCISE 1E

(1) Simplify:

(2) Verify whether the given statement is true or false:

(3) Verify whether the given statement is true or false:

(4) The product of two rational numbers is – 9. If one of the numbers is – 12, find the other.

(5) The product of two rational numbers is (-16)/9. If one of the numbers is (-4)/3, find the other.

(6) By what rational number should we multiply (-15)/56 to get (-5)/7?

(7) By what rational number should (-8)/39 be multiplied to obtain 1/26?

(8) By what number should (-33)/8 be divided to get (-11)/2?

(9) Divide the sum of 13/5 and (-12)/7 by the product of (-31)/7 and 1/(-2).

(10) Divide the sum of 65/12 and 8/3 by their difference.

(11) Fill in the blanks:

(12) (i) Are rational numbers always closed under division?

Ans: No

(ii) Are rational numbers always commutative under division?

Ans: No

(iii) Are rational numbers always associative under division?

Ans: No

(iv) Can we divide 1 by 0?

Ans: No