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

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

EXERCISE 1C

(1) Add the following rational numbers:

(2) Add the following rational numbers:

(3) Verify the following:

(4) Verify the following:

(5) Fill in the blanks:

(6) Find the additive inverse of each of the following:

(7) Subtract:

(8) Using the rearrangement property find the sum:       

(9) The sum of two rational numbers is – 2. If one of the numbers is (-14)/5find the other.

Solution: Let the required number be x.

(10) The sum of two rational numbers is (-1)/2. If one of the numbers is 5/6, find the other.

Solution: Let the required number be x.

(11) What number should be added to (-5)/8 so as to get (-3)/2?

(12) What number should be added to – 1 so as to get 5/7?

(13) What number should be subtracted from (-2)/3 to get (-1)/6?

(14) (i) Which rational number is its own additive inverse?

Ans: 0.

(ii) Is the difference of two rational numbers a rational number?

Ans: Yes.

(iii) Is addition commutative on rational numbers?

Ans: Yes.

(iv) Is addition associative on rational numbers?

Ans: Yes.

(v) Is subtraction commutative on rational numbers?

Ans: No.

(vi) Is subtraction associative on rational numbers?

Ans: No.

(vii) What is the negative of a negative rational number?

Ans: The number itself.