• Skip to main content
  • Skip to secondary menu
  • Skip to primary sidebar

Class Notes

Free Education for All

  • Class 1-5
  • Class 6
  • Class 7
  • Class 8
  • Class 9
  • Class 10
  • Class 11
  • Class 12
  • NCERT Solutions
    • NCERT Books
You are here: Home / NCERT Solutions / Class 7 / Maths / Chapter 2 Fractions and Decimals / Class 7 Maths Exercise 2.7

Class 7 Maths Exercise 2.7

Last Updated on August 26, 2020 By Mrs Shilpi Nagpal Leave a Comment

NCERT Answers for Class 7 Maths
Chapter 2 Fractions and Decimals Exercise 2.7

Chapter 2  Exercise 2.1
Chapter 2  Exercise 2.2
Chapter 2  Exercise 2.3
Chapter 2 Exercise 2.4
Chapter 2 Exercise 2.5
Chapter 2 Exercise 2.6

Page 52

Ex 2.7 Class 7 Maths Question 1. Find:
(i) 0.4 ÷ 2 (ii) 0.35 ÷ 5 (iii) 2.48 ÷ 4 (iv) 65.4 ÷ 6
(v) 651.2 ÷ 4 (vi) 14.49 ÷ 7 (vii) 3.96 ÷ 4 (viii) 0.80 ÷ 5

(i) 0.4 ÷ 2

Answer

= (4/10) ÷ 2

= (4/10) × (1/2)

= (2/10) × (1/1)

= (2/10)

On dividing a decimal by 10, the decimal point is shifted to the left by one place.

= 0.2

(ii) 0.35 ÷ 5

Answer

= (35/100) ÷ 5

= (35/100) × (1/5)

= (7/100) × (1/1)

= (7/100)

On dividing a decimal by 100, the decimal point is shifted to the left by two places.

= 0.07

(iii) 2.48 ÷ 4

Answer

= (248/100) ÷ 4

= (248/100) × (1/4)

= (62/100) × (1/1)

= (62/100)

On dividing a decimal by 100, the decimal point is shifted to the left by two places.

= 0.62

(iv) 65.4 ÷ 6

Answer

= (654/10) ÷ 6

= (654/10) × (1/6)

= (109/10) × (1/1)

= (109/10)

On dividing a decimal by 10, the decimal point is shifted to the left by one place.

= 10.9

(v) 651.2 ÷ 4

Answer

= (6512/10) ÷ 4

= (6512/10) × (1/4)

= (1628/10) × (1/1)

= (1628/10)

On dividing a decimal by 10, the decimal point is shifted to the left by one place.

= 162.8

(vi) 14.49 ÷ 7

Answer

= (1449/100) ÷ 7

= (1449/100) × (1/7)

= (207/100) × (1/1)

= (207/100)

On dividing a decimal by 100, the decimal point is shifted to the left by two places.

= 2.07

(vii) 3.96 ÷ 4

Answer

= (396/100) ÷ 4

= (396/100) × (1/4)

= (99/100) × (1/1)

= (99/100)

On dividing a decimal by 100, the decimal point is shifted to the left by two places.

= 0.99

(viii) 0.80 ÷ 5

Answer

= (80/100) ÷ 5

= (80/100) × (1/5)

= (16/100) × (1/1)

= (16/100)

On dividing a decimal by 100, the decimal point is shifted to the left by two places.

= 0.16


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

On dividing a decimal by 10, the decimal point is shifted to the left by one place.

= 4.8 ÷ 10

= (4.8/10)

= 0.48

(ii) 52.5 ÷ 10

Answer

On dividing a decimal by 10, the decimal point is shifted to the left by one place.

= 52.5 ÷ 10

= (52.5/10)

= 5.25

(iii) 0.7 ÷ 10

Answer

On dividing a decimal by 10, the decimal point is shifted to the left by one place.

= 0.7 ÷ 10

= (0.7/10)

= 0.07

(iv) 33.1 ÷ 10

Answer

On dividing a decimal by 10, the decimal point is shifted to the left by one place.

= 33.1 ÷ 10

= (33.1/10)

= 3.31

(v) 272.23 ÷ 10

Answer

On dividing a decimal by 10, the decimal point is shifted to the left by one place.

= 272.23 ÷ 10

= (272.23/10)

= 27.223

(vi) 0.56 ÷ 10

Answer

On dividing a decimal by 10, the decimal point is shifted to the left by one place.

= 0.56 ÷ 10

= (0.56/10)

= 0.056

(vii) 3.97 ÷10

Answer

On dividing a decimal by 10, the decimal point is shifted to the left by one place.

= 3.97 ÷ 10

= (3.97/10)

= 0.397


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

(i) 2.7 ÷ 100

Answer

On dividing a decimal by 100, the decimal point is shifted to the left by two places.

= 2.7 ÷ 100

= (2.7/100)

= 0.027

(ii) 0.3 ÷ 100

Answer

On dividing a decimal by 100, the decimal point is shifted to the left by two places.

= 0.3 ÷ 100

= (0.3/100)

= 0.003

(iii) 0.78 ÷ 100

Answer

On dividing a decimal by 100, the decimal point is shifted to the left by two places.

= 0.78 ÷ 100

= (0.78/100)

= 0.0078

(iv) 432.6 ÷ 100

Answer

On dividing a decimal by 100, the decimal point is shifted to the left by two places.

= 432.6 ÷ 100

= (432.6/100)

= 4.326

(v) 23.6 ÷100

Answer

On dividing a decimal by 100, the decimal point is shifted to the left by two places.

= 23.6 ÷ 100

= (23.6/100)

= 0.236

(vi) 98.53 ÷ 100

Answer

On dividing a decimal by 100, the decimal point is shifted to the left by two places.

= 98.53 ÷ 100

= (98.53/100)

= 0.9853


4. Find:
(i) 7.9 ÷ 1000 (ii) 26.3 ÷ 1000 (iii) 38.53 ÷ 1000
(iv) 128.9 ÷ 1000 (v) 0.5 ÷ 1000

(i) 7.9 ÷ 1000

Answer

On dividing a decimal by 1000, the decimal point is shifted to the left by three places.

= 7.9 ÷ 1000

= (7.9/1000)

= 0.0079

 

(ii) 26.3 ÷ 1000

Answer

On dividing a decimal by 1000, the decimal point is shifted to the left by three places.

= 26.3 ÷ 1000

= (26.3/1000)

= 0.0263

(iii) 38.53 ÷ 1000

Answer

On dividing a decimal by 1000, the decimal point is shifted to the left by three places.

= 38.53 ÷ 1000

= (38.53/1000)

= 0.03853

(iv) 128.9 ÷ 1000

Answer

On dividing a decimal by 1000, the decimal point is shifted to the left by three places.

= 128.9 ÷ 1000

= (128.9/1000)

= 0.1289

(v) 0.5 ÷ 1000

Answer

On dividing a decimal by 1000, the decimal point is shifted to the left by three places.

= 0.5 ÷ 1000

= (0.5/1000)

= 0.0005


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

(i) 7 ÷ 3.5

Answer

= 7 ÷ (35/10)

= 7 × (10/35)

= 1 × (10/5)

= 2

(ii) 36 ÷ 0.2

Answer

= 36 ÷ (2/10)

= 36 × (10/2)

= 18 × 10

= 180

(iii) 3.25 ÷ 0.5

Answer

= (325/100) ÷ (5/10)

= (325/100) × (10/5)

= (325 × 10)/ (100 × 5)

= (65 × 1)/ (10 × 1)

= 65/10

= 6.5

 

(iv) 30.94 ÷ 0.7

Answer

= (3094/100) ÷ (7/10)

= (3094/100) × (10/7)

= (3094 × 10)/ (100 × 7)

= (442 × 1)/ (10 × 1)

= 442/10

= 44.2

(v) 0.5 ÷ 0.25

Answer

= (5/10) ÷ (25/100)

= (5/10) × (100/25)

= (5 × 100)/ (10 × 25)

= (1 × 10)/ (1 × 5)

= 10/5

= 2

(vi) 7.75 ÷ 0.25

Answer

= (775/100) ÷ (25/100)

= (775/100) × (100/25)

= (775 × 100)/ (100 × 25)

= (155 × 1)/ (1 × 5)

= (31 × 1)/ (1 × 1)

= 31

(vii) 76.5 ÷ 0.15

Answer

= (765/10) ÷ (15/100)

= (765/10) × (100/15)

= (765 × 100)/ (10 × 15)

= (51 × 10)/ (1 × 1)

= 510

(viii) 37.8 ÷ 1.4

Answer

= (378/10) ÷ (14/10)

= (378/10) × (10/14)

= (378 × 10)/ (10 × 14)

= (27 × 1)/ (1 × 1)

= 27

(ix) 2.73 ÷ 1.3

Answer

= (273/100) ÷ (13/10)

= (273/100) × (10/13)

= (273 × 10)/ (100 × 13)

= (21 × 1)/ (10 × 1)

= 21/10

= 2.1


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 of petrol?

Answer

Total distance covered by vehicle in 2.4 litres of petrol = 43.2 km

Distance covered in 1 litre of petrol = 43.2 ÷ 2.4

= (432/10) ÷ (24/10)

= (432/10) × (10/24)

= (432 × 10)/ (10 × 24)

= (36 × 1)/ (1 × 2)

= (18 × 1)/ (1 × 1)

= 18 km

∴ Total distance covered in 1 liter of petrol is 18 km.

Filed Under: Chapter 2 Fractions and Decimals, Class 7, NCERT Solutions

About Mrs Shilpi Nagpal

Author of this website, Mrs Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed (I. P. University) and has many years of experience in teaching. She has started this educational website with the mindset of spreading Free Education to everyone.

Reader Interactions

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Primary Sidebar

Recent Posts

  • Chapter 7 The Last Leaf
  • Chapter 6 Weathering the Storm in Ersama
  • Chapter 5 The Happy Prince
  • Chapter 4 In the Kingdom of Fools
  • Chapter 3 Iswaran the Storyteller
  • Chapter 2 The Adventures of Toto
  • Chapter 1 The Lost Child
  • Chapter 11 If I were You
  • Chapter 10 Kathmandu
  • Email
  • Facebook
  • Pinterest
  • RSS
  • Twitter

Copyright © 2022 · About Us · Contact Us · Privacy Policy