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Mathsight Class 7 Solutions Chapter 4 Decimals
Welcome to NCTB Solutions. Here with this post we are going to help 7th class students to solve MathSight Class 7 Mathematics Book, Chapter 4, Decimals. Here students can easily get all the exercise questions solution for Chapter 4, Decimals Exercise 4.1, 4.2 and 4.3
Decimals Exercise 4.1 Solution :
Question no – (1)
Solution :
Correct option – (c)
= 0.4 × 0.5
= 0.20
Question no – (2)
Solution :
(a) 3 decimal
(b) 4 decimal
(c) 5 decimal
(d) 6 decimal
Question no – (3)
Solution :
(a) 7.6 × 12
= 91.2
∴ The product is 91.2
(b) 7.88 × 14
= 110.32
∴ The product is 110.32
(c) 0.59 × 88
= 51.92
∴ The product is 51.92
(d) 1.1 × 110
= 121
∴ The product is 121
(e) 7.01 × 1.1
= 7.711
∴ The product is 7.711
(f) 175.4 × 2.3
= 403.42
∴ The product is 403.42
(g) 64.87 × 1.01
= 65.51
∴ The product is 65.51
(h) 99.01 × 0.001
= 0.099
∴ The product is 0.099
(i) 0.045 × 10
= 0.45
∴ The product is 0.45
(j) 88.8 × 100
= 8880
∴ The product is 8880
(k) 7.594 × 100
= 759.4
∴ The product is 759.4
(l) 88.8 × 100
= 88,8000
∴ The product is 88,8000
(m) 4.359 × 1
= 4.359
∴ The product is 4.359
(n) 0.15 × 0
= 0
∴ The product is 0
(o) 0.001 × 1
= 0.001
∴ The product is 0.001
Question no – (4)
Solution :
(a) 950.62
(b) 95.062
(c) 950.62
(d) 9.5062
Question no – (5)
Solution :
1.25 × 7
= 8.75 > 7
Question no – (6)
Solution :
= 1.7 × 2.4
= 4.08
Question no – (7)
Solution :
Weigh = 60 × 0.167
= 10.02 kg
Hence, the weigh of the astronaut will be 10.02 kg
Question no – (8)
Solution :
1 week = 7 day
∴ 7 day’s growth,
= 1.15 × 7
= 8.05 feet
Therefore, the growth of the plant will be 8.05 feet in 1 week.
Question no – (9)
Solution :
45 day’s growth,
= 45 × 0.1
= 4.5 mm
90 day’s growth,
= 90 × 0.1
= 9 mm
Question no – (10)
Solution :
Distance,
= 8.45 × 1.67
= 14.1115 cm
Question no – (11)
Solution :
Gold contain in 22 karat,
= 0.916 × 25.6
= 23.4496 gm,
Gold contain in 14 karat,
= 0.585 × 25.6
= 14.976 gm,
∴ 22 karat > 14 karat .
Question no – (12)
Solution :
(a) Distance,
= 15.26 × 15.24
= 232.56 km.
(b) Distance,
= 20.45 × 10.5
= 214.725 km.
Decimals Exercise 4.2 Solution :
Question no – (1)
Solution :
(b) 2.4 / 0.8 = 3
Question no – (2)
Solution :
(a) 46.5
(b) 0.58
(c) 12.61
(d) 754.66
Question no – (3)
Solution :
(a) 16.458/100 = 0.016458
(b) 745.3/100 = 0.7453
(c) 9.59/100 = 0.0959
(d) 5.55/100 = 0.0555
(e) 0.017/100 = 0.00017
(f) 75/1000 = 0.075
(g) 593.5/1000 = 0.05935
(h) 0.59/1000 = 0.0059
Question no – (4)
Solution :
(a) 1.254
(b) 1.247
(c) 0.1968
(d) 0.041
(e) 0.217
(f) 0.51
(g) 0.6
(h) 0.75
(i) 8.4
(j) 15.96
(k) 0.0006
(l) 0.1138
Question no – (5)
Solution :
= 60.96/2.54
= 24 inch.
∴ 60.96 cm = 24 inch
Question no – (6)
Solution :
Other,
= 18.576/5.4
= 3.44
Thus, the other number will be 3.44
Question no – (7)
Solution :
Distance in 1 hr,
= 198.22/4.4
= 45.05 km.
Therefore, the car will cover 45.05 km in 1 hour.
Question no – (8)
Solution :
Sheela bought,
= 4005 ml
= 4.005 l
Joshi bought,
= 4050 ml
= 4.050 l
∴ Joshi > Sheela .
Question no – (9)
Solution :
Distance in 1L
= 331.25 / 25
= 13.25 km.
Hence, the bus will cover 13.25 km in 1 litre petrol.
Question no – (10)
Solution :
7.534 g = 7534 mg .
∴ 7534 > 5300
∴ 7534 – 5300
= 2234 mg
Question no – (11)
Solution :
1.75 kg = 1750 g.
∴ Numbers of pineapple,
= 1750/250
= 7
Thus, Ella can make 7 cakes
Question no – (12)
Solution :
(a) 0.20/0.125
= 1.6 time faster.
(b) Rohit take pic,
= 0.125/2.5
= 0.05
Decimals Exercise 4.3 Solution :
Question no – (1)
Solution :
(a) 5.43 km = 5430 m.
(b) 0.75 km = 750 m .
(c) 0.042 m = 4.2 cm .
(d) 9.32 m = 932 cm .
(e) 0.5 cm = 5 mm.
(f) 1.2 m = 1200 mm.
Question no – (2)
Solution :
(a) 4.635 kg = 4635 g
(b) 7.50 kg = 7500 g
(c) 0.385 kg = 385 g
(d) 0.159 kL = 159 L
(e) 4.55 L = 4550 ml
(f) 0.95 L = 950 mL
Previous Chapter Solution :
