Find the multiplicative inverse of the following. (i) -13 (ii) (iii) (iv) (v) (vi) -1

NCERT - Mathematics

Book: NCERT - Mathematics

Chapter: 1. Rational Numbers

Subject: Maths - Class 8^th

Q. No. 4 of Exercises 1.1

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4

Find the multiplicative inverse of the following.
(i) -13

(ii)

(iii)

(iv)

(v)

(vi) -1

(i) The multiplicative inverse of “a” is given as “”

Therefore,

(ii) The multiplicative inverse of “a” is given as “”

Therefore,

(iii) The multiplicative inverse of “a” is given as “”

Therefore,

(iv) The multiplicative inverse of “a” is given as “”

Therefore,

(v) The multiplicative inverse of “a” is given as “”

Therefore,

(vi) The multiplicative inverse of “a” is given as “”

Therefore,

4

Chapter Exercises

Exercises 1.1

Exercises 1.2

1

Using appropriate properties find.
(i)
(ii)

2

Write the additive inverse of each of the following.
(i)

(ii)

(iii)

(iv)

(v)

3

Verify that -(-x)=x for.

(i) $x=\frac{11}{15}$

(ii) $x=\frac{-13}{17}$

4

Find the multiplicative inverse of the following.
(i) -13

(ii)

(iii)

(iv)

(v)

(vi) -1

5

Name the property under multiplication used in each of the following.
(i)

(ii)

(iii)

6

Multiply by the reciprocal of

7

Tell what property allows you to compute as

8

Is the multiplicative inverse of Why or why not?

9

Is 0.3 the multiplicative inverse of Why or why not?

10

Write.
(i) The rational number that does not have a reciprocal.

(ii) The rational numbers that are equal to their reciprocals.

(iii) The rational number that is equal to its negative.

11

Fill in the blanks.
(i) Zero has ____ reciprocal.

(ii) The numbers and are their own reciprocals.

(iii) The reciprocal of – 5 is .

(iv) Reciprocal of where is .

(v) The product of two rational numbers is always a _.

(vi) The reciprocal of a positive rational number is ______.