NCERT Solution class 7 Mathematics EXERCISE- 2.4

                   CHAPTER – 2

                   EXERCISE – 2.4

 

Q1. Find:

(i) 12 ÷ ¾

SOLUTION:-

We have,

= 12 x 4/3

= 16

(ii) 14 ÷ 5/6

SOLUTION:-

= 14 X 6/5

= 84/5

(iii) 8 ÷ 7/3

SOLUTION:-

= 8 X 3/7

= 24/7

(iv) 4 ÷ 8/3

SOLUTION:-

= 4 X 3/8

= 24/8

= 3

(v) 3 ÷ 7/3

SOLUTION:-

= 3 X 3/7

= 9/7

(vi)  5 ÷ 25/7

SOLUTION:-

= 5 X 7/25

= 35/25

= 7/5

Q2.Find the reciprocal of each of the following fractions. Classify the reciprocal as proper fractions, improper fractions, and whole numbers.

(i) 3/7

SOLUTION:-

= 7/3 ( IMPR0PER FRACTION)

(ii) 5/8

SOLUTION:-

= 8/5 (  IMPROPER FRACTION)

(iii) 9/7

SOLUTION:-

= 7/9 ( PROPER FRACTION)

(iv) 6/5

SOLUTION:-

= 5/6 ( PROPER FRACTION)

(v) 12/7

SOLUTION:-

= 7/12 ( PROPER FRACTION)

(vi) 1/8

SOLUTION:-

= 8 (WHOLE NUMBERS)

(vii) 1/11

SOLUTION:-

= 11 ( WHOLE NUMBERS)

Q3. Find:

(i) 7/3 ÷ 2

SOLUTION:-

= 7/3 X ½

=  7/6

(ii) 4/9 ÷ 5

SOLUTION:-

= 4/45

(iii) 6/13 ÷ 7

SOLUTION:-

=  6/91

(iv) 13/3 ÷  3

SOLUTION:-

= 13/3 X 1/3

= 13/9

(v) 7/2 ÷ 4

SOLUTION:-

= 7/8

(vi) 31/7 ÷ 7

SOLUTION:-

= 31/49

Q4. Find:

(i) 2/5 ÷ ½

SOLUTION:-

= 4/5

(ii) 4/9 ÷  2/3

SOLUTION:-

= 12/18

= 4/6

= 2/3

(iii) 3/7 ÷ 8/7

SOLUTION:-

= 3/8

(iv) 7/3 ÷ 3/5

SOLUTION:-

= 7/3

(v) 7/2 ÷8/3

SOLUTION:-

= 21/16

(vi) 2/5 ÷ 3/2

SOLUTION:-

= 3/2

(vii) 16/5 ÷ 5/3

SOLUTION:-

= 5/3

(viii) 11/5 ÷ 6/5

SOLUTION:-

= 11/6