Fractions and Decimals - Solutions 7
CBSE Class –VII Mathematics
NCERT Solutions
Chapter 2 Fractions and Decimals (Ex. 2.7)
NCERT Solutions
Chapter 2 Fractions and Decimals (Ex. 2.7)
Question 1. Find:
(i) 0.4 2
(ii) 0.35 5
(iii) 2.48 4
(iv) 65.4 6
(v) 651.2 4
(v) 14.49 7
(vii) 3.96 4
(viii) 0.80 5
(ii) 0.35 5
(iii) 2.48 4
(iv) 65.4 6
(v) 651.2 4
(v) 14.49 7
(vii) 3.96 4
(viii) 0.80 5
Answer: (i) 0.4 2 = = 0.2
(ii) 0.35 5 = = 0.07
(iii)2.48 4 = = 0.62
(iv) 65.4 6 = = 10.9
(v) 651.2 4 = = 162.8
(vi)14.49 7 = = 2.07
(vii)3.96 4 = = 0.99
(viii)0.80 5 = = 0.16
Question 2. Find:
(i) 4.8 10
(ii) 52.5 10
(iii) 0.7 10
(iv) 33.1 10
(v) 272.23 10
(vi) 0.56 10
(vii) 3.97 10
Answer: (i) 4.8 10 = = 0.48
(ii) 52.5 10 = = 5.25
(iii) 0.7 10 = = 0.07
(iv) 33.1 10 = = 3.31
(v) 272.23 10 = = 27.223
(vi) 0.56 10 = = 0.056
(vii) 3.97 10 = = 0.397
Question 3. Find:
(i) 2.7 100
(ii) 0.3 100
(iii) 0.78 100
(iv) 432.6 100
(v) 23.6 100
(vi) 98.53 100
Answer: (i) 2.7 100 = = 0.027
(ii) 0.3 100 = = 0.003
(iii) 0.78 100 = = 0.0078
(iv) 432.6 100 = = 4.326
(v) 23.6 100 = = 0.236
(vi) 98.53 100 = 0.9853
Question 4. Find:
(i) 7.9 1000
(ii) 26.3 1000
(iii) 38.53 1000
(iv) 128.9 1000
(v) 0.5 1000
Answer: (i) 7.9 1000 = = 0.0079
(ii) 26.3 1000 = = 0.0263
(iii) 38.53 1000 = = 0.03853
(iv) 128.9 1000 = = 0.1289
(v) 0.5 1000 = = 0.0005
Question 5. Find:
(i) 7 3.5
(ii) 36 0.2
(iii) 3.25 0.5
(iv) 30.94 0.7
(v) 0.5 0.25
(vi) 7.75 0.25
(vii) 76.5 0.15
(viii) 37.8 1.4
(ix) 2.73 1.3
Answer: (i) 7 3.5 = = 2
(ii) 36 0.2 = 18 x 10 = 180
(iii) 3.25 0.5 = = 6.5
(iv) 30.94 0.7 = = 44.2
(v) 0.5 0.25 = = 2
(vi) 7.75 0.25 = = 31
(vii) 76.5 0.15 = = 51 x 10 = 510
(viii) 37.8 1.4 = = 27
(ix) 2.73 1.3 = = 2.1
Question 6. A vehicle covers a distance of 43.2 km in 2.4 litres of petrol. How much distance will it cover in one litre petrol?
Answer: In 2.4 litres of petrol, distance covered by the vehicle = 43.2 km
In 1 litre of petrol, distance covered by the vehicle = 43.2 2.4
= =