NCERT Solutions Class 4 Mathematics Chapter 6 The Junk Seller

NCERT Solutions Class 4 Mathematics Chapter 6 The Junk Seller have been provided below and is also available in Pdf for free download. The NCERT solutions for Class 4 Mathematics have been prepared as per the latest syllabus, NCERT books and examination pattern suggested in Class 4 by CBSE, NCERT and KVS. Questions given in NCERT book for Class 4 Mathematics are an important part of exams for Class 4 Mathematics and if answered properly can help you to get higher marks. Refer to more Chapter-wise answers for NCERT Class 4 Mathematics and also download more latest study material for all subjects. Chapter 6 The Junk Seller is an important topic in Class 4, please refer to answers provided below to help you score better in exams

Chapter 6 The Junk Seller Class 4 Mathematics NCERT Solutions

Class 4 Mathematics students should refer to the following NCERT questions with answers for Chapter 6 The Junk Seller in Class 4. These NCERT Solutions with answers for Class 4 Mathematics will come in exams and help you to score good marks

Chapter 6 The Junk Seller NCERT Solutions Class 4 Mathematics

NCERT Solutions for Class 4 Mathematics Math Magic for Chapter 6 The Junk Seller

Chapter -6

THE JUNK SELLER

1. What about you? Do you also find Maths difficult?

Ans.I do not find Maths difficult.


2. What is the most difficult thing in you Maths book?

Ans.The chapter entitled “The Way the World Looks” is the most difficult thing in Maths book.


3. What do you think is the easiest lesson?

Ans.The lesson “A Trip to Bhopal” is the essential.


4. Find out: how much for a cup of tea?

Ask people and find out the cost of a cup of tea

(a) At a tea stall

Ans. (a)At a tea stall, the cost of a cup is Rs 3.

(b) At a hotel

Ans. (b)At a hotel, the cost of a cup is Rs 10.


5. If a person who runs a tea stalls earns Rs 30 in a day, how much will he earn in 10 days? And in a month? How did you get the answer? Discuss.

Ans.Earning of a tea stall owner per day = Rs 30

Therefore, earning of a tea stall owner in 10 days = Rs (10 30) = Rs 300

And his, earning in a month = Rs (30 30) = Rs 900

I got the answers by multiplication.


6. Find out: What is a loan?

(a) Have you ever heard of someone taking a loan? For what?

Ans. (a)Yes, I have heard of someone taking a loan. It is taken to buy a handcart.

(b) How much loan was taken?

Ans. (b)Rs 300 was taken as loan.

(c) How much money was paid back.

Hariya and Babu went to buy a handcart for Rs 300.

Ans. (c) Hariya:I have taken a loan of Rs 300 from a Bank for six months. I will pay Rs 51 every month to the bank.

Babu:But I have taken a loan of Rs 300 from Chunnilal. After six months, I will pay back Rs 360.

(d) Who has to pay back more- Hariya or Babu?

Ans. (d)In case of Hariya: Money paid back to the bank = Rs. 6 51 = Rs 306

In case of Babu: Money paid back to Chunnilal = Rs 360

Since, Rs 360 is more than Rs 300, therefore, Babu paid back more money.


7. (a) Have 9 rickshaws of my own. I give the rickshaws on rent, each of Rs 20 a day. On Sundays I do not take any money from them? How much does Kiran earn from 9 Rickshaws in a Day?

Ans. (a)For 1 rickshaw she gets Rs 20 per day.

So, for 9 rickshaws she will earn Rs 180.

(b) How did you do it?

Ans. (b)I did it by multiplying 20 and 9 (20 9=180).


8. In a week how much does Kiran earn from one rickshaw?

Ans.Since on Sundays Kiran does not take any money for rickshaw’s rent, therefore, Kiran earns in a week on one rickshaw at the rate of Rs 20 per day = Rs 6 20 = Rs 120.


9. Do it mentally and write the answers:

(a) 2 6= __

Ans. (a)2 6= 12.

(b) 20 6 = __

Ans. (b)20 6 = 120.

(c) 2 60 = __

Ans. (c)2 60 = 120.

(d) 3 42 = __

Ans. (d)3 42 = 126.

(e) 4 80 = __

Ans. (e)4 80 = 320.

(f) 4 81 = __

Ans. (f)4 81 = 324.

(g) 9 25 = __

Ans. (g)9 25 = 225.

(h) 31 9 = __

Ans. (h)31 9 = 279.


10. 4 81 is 4 more than 4 80. Am I right?

Ans.Yes.


11. How much Kiran will pay for 31 kg newspaper?

Ans.Kiran will pay for 31 kg newspaper = Rs (51 30 + 5 1) = Rs 155.


12.
 

(a) How much Kiran pay for 42 kg newspaper?

Ans. (a)Kiran will pay Rs (42 5) = Rs 210.

(b) Also find the costs of:

(i) 22 kg of plastic

Ans. (b) (i)Cost of 22 kg of plastic = Rs (22 10) = Rs 220.

(ii) 23 kg of wastepaper

Ans. (b) (ii)Cost of 23 kg of newspaper = Rs (23 4) = Rs 92.

(iii) 12 kg of iron.

Ans. (b) (iii)Cost of 12 kg of iron = Rs (12 12) = Rs 144.


13. Can you do this without writing? Guess the total money Kiran will pay to the junk collectors. Will it be: More than 600? Less than 600?

Ans.Less than 600.


14. Kiran bought 1 kg of plastic for Rs 10, but sold 1 kg plastic for Rs 12. How much money does she earn on selling 1 kg plastic?

Ans.Earning on selling 1 kg of plastic = Selling price – Cost price = Rs 12 – Rs 10 = Rs 2

So, earning on selling 63 kg of plastic = Rs 2 Rs 63

60 3
60 2 3 2
120 6

On adding the numbers in the last row = 120 + 6 = 126.

So, for 63 kg of plastic, Kiran earns = Rs 126.


15. How much money will Dinu pay for 32 kg iron?

Ans.The rate of 1 kg of iron is Rs 14. So, the cost for 32kg of iron is Rs 14 32.

We write as:

30 2
10 30 10 2 10
300 20
4 30 4 2 4
120 8

So, for 32 kg iron, Dinu will pay Rs 448.


16. Kiran buys 1 kg iron for Rs 12, but sells it for Rs 14. How much does she earn when she sells 32 kg iron?

Ans.Earning of selling 1 kg iron = Selling price -Cost price = Rs 14 – Rs 12 = Rs 2

So, earning on selling 32 kg of iron = Rs 2 32 of iron = Rs 2 32

We write as:

30 2
30 2 2 2
60 4

So, Kiran earns Rs 64 on the sale of 32 kg iron.


17. I bought 1 kg newspaper for Rs 5, but sold it for Rs 6. How much money did I earn by selling 152 kg of newspaper?

Ans.Rs 152.


18. How much money will Dinue pay for 4 kg brass? Guess the answer first.

Ans.The rate of 1 kg brass is Rs 170. So, the cost of 4 kg brass is Rs 170 4. We guess the answer to lie between Rs 600 and Rs 800.

We write as:

 

4

100 70
100 4 70 4
400 280

So, for 4 kg brass Dinu will pay Kiran Rs 680.


19. First guess the answer then calculate:

(a) 37 18

Ans. (a)On guessing 37 18 may be = 740.

We write as:

30 7
10 30 10 7 10
300 70
8 30 8 7 8
240 56

Adding the numbers = 300 + 240 + 70 + 56 = 666

So, 37 18 = 666.

(b) 45 24

Ans. (b)On guessing 45 24 = 1080

We write as:

40 7
20 40 20 5 20
800 100
4 40 4 5 4
160 20

Adding the numbers = 800 + 160 + 100 + 20 = 1080

So, 45 24 = 1080

(c) 69 52

Ans. (c)On guessing 69 52 = 3588

We write as:

60 9
50 60 50 9 50
3000 450
2 60 2 9 2
120 18

Adding the numbers = 3000 + 120 + 450 + 18 = 3588

So, 69 52 = 3588.

(d) 77 55

Ans. (d)On guessing 77 55 = 4235

We write as:

70 7
50 70 50 7 50
3500 350
5 70 5 7 5
350 35

Adding the numbers = 3500 + 350 + 350 + 35 = 4235

So, 77 55 = 4235.

(e) 142 5

Ans. (e)On guessing 142 5 = 710

We write as:

100 40 2
5 100 5 40 5 2 5
500 200 10

Adding the numbers = 500 + 200 + 10 = 710

So, 142 5= 710.

(f) 382 3

Ans. (f)On guessing 382 3 =1146

We write as:

300 80 2
3 300 3 80 3 2 3
900 240 6

Adding the numbers = 900 + 240 + 6 = 1146

So, 382 3 = 1146

(g) 2 175

Ans. (g)On guessing 2 175 = 350

We write as:

100 70 5
2 100 2 70 2 5 2
200 140 10

Adding the numbers = 200 + 140 + 10 = 350

So, 2 175 = 350.

(h)4 206

Ans. (h)On guessing 4 206 = 824

We write as:

     200 0 6
4 200 4 0 4 6 4
800 0 24

Adding the numbers = 800 + 0 + 24 = 824

So, 4 206 = 824.

 

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