# Mathsight Class 7 Solutions Chapter 4

## 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 :

Updated: May 27, 2023 — 5:51 am