# 1. Knowing Our Numbers Mathematics class 6 exercise Exercise 1.3

1. Knowing Our Numbers Mathematics class 6 exercise Exercise 1.3 ncert book solution in english-medium

## NCERT Books Subjects for class 6th Hindi Medium

### Exercise 1.1

## Exercise-1.1 ch-1

1. Fill in the blanks:

(a) 1 lakh = __10______ ten thousand.

(b) 1 million =__10______ hundred thousand.

(c) 1 crore = __10______ ten lakh.

(d) 1 crore = __10______ million.

(e) 1 million = __10______ lakh.

2. Place commas correctly and write the numerals:

(a) Seventy three lakh seventy five thousand three hundred seven. 73,75,307

(b) Nine crore five lakh forty one. 9,05,00,041

(c) Seven crore fifty two lakh twenty one thousand three hundred two. 7,52,21,302

(d) Fifty eight million four hundred twenty three thousand two hundred two.6,84,23,202

(e) Twenty three lakh thirty thousand ten. 23,30,010

3. Insert commas suitably and write the names according to Indian System of

Numeration :

(a) 8,75,95,762 : eight crore, seventy five lakh, ninety five thousand, seven hundred sixty two

(b) 85,46,283 : eighty five lakh, fourty`six thousand,

(c) 9,99,00,046 : nine crore ninety nine lakh fourty six.

(d) 9,84,32,701 : nine crore eigty four lakh thirty two seven hundred one.

4. Insert commas suitably and write the names according to International System

of Numeration :

(a) 78921092 : 78,921,092

(b) 7452283 : 7,452,283

(c) 99985102 : 99,985,102

(d) 48049831 : 48,049,831

### Exercise 1.2

## Exercise-1.2 Chapter-1

1. A book exhibition was held for four days in a school. The number of tickets sold at the counter on the first, second, third and final day was respectively 1094, 1812, 2050 and 2751. Find the total number of tickets sold on all the four days.

Ans: The ticket sold at the counter on first day : 1094

The ticket sold at the counter on second day : 1812

The ticket sold at the counter on third day : 2050

The ticket sold at the counter on final (fourth) day : 2751

THe ticket sold in four day =1094+1812+2050+2751

Answer : The ticket sold at the counter on four day=

2. Shekhar is a famous cricket player. He has so far scored 6980 runs in test matches. He wishes to complete 10,000 runs. How many more runs does he need?

Answer: He scored run in test matches : 6980

He wished to complete run : 10000

More run he need : 10000-6980

More run he need :

3. In an election, the successful candidate registered 5,77,500 votes and his nearest rival secured 3,48,700 votes. By what margin did the successful candidate win the election?

Answer- In an election, the first candidate registered votes-5,77,500

His nearest rival secured votes-3,48,700

In an election, the margin between candidates votes- 577500-348700

the margin between two candidates- 231200

4. Kirti bookstore sold books worth Rs 2,85,891 in the first week of June and books worth Rs 4,00,768 in the second week of the month. How much was the sale for the two weeks together? In which week was the sale greater and by how much?

Ans- In the first week of June books sold- Rs 2,85,891

In the second week of June books sold- Rs 4,00,768

The sale for the two weeks together -4,00,768-2,85,891 The sale for the two weeks together-

The greater sale in two week -

the margin of two sales is 1,24,977

5. Find the difference between the greatest and the least number that can be written using the digits 6, 2, 7, 4, 3 each only once.

Ans- The greatest number- 76,432

The least number- 23467

The difference between the numbers-

6. A machine, on an average, manufactures 2,825 screws a day. How many screws did it produce in the month of January 2006?

Answer- A machine manufactures screws in a day- 2,825 A machine manufactures screws in month of january-

7. A merchant had Rs 78,592 with her. She placed an order for purchasing 40 radio sets at Rs 1200 each. How much money will remain with her after the purchase?

8. A student multiplied 7236 by 65 instead of multiplying by 56. By how much was his answer greater than the correct answer? (Hint: Do you need to do both the multiplications?)

9. To stitch a shirt, 2 m 15 cm cloth is needed. Out of 40 m cloth, how many shirts can be stitched and how much cloth will remain?

(Hint: convert data in cm.)

10. Medicine is packed in boxes, each weighing 4 kg 500g. How many such boxes can be loaded in a van which cannot carry beyond 800 kg?

11. The distance between the school and the house of a student’s house is 1 km 875 m. Everyday she walks both ways. Find the total distance covered by her in six days.

12. A vessel has 4 litres and 500 ml of curd. In how many glasses, each of 25 ml capacity, can it be filled?

### Exercise 1.3

## Exercise1.3 ch-1

1. Estimate each of the following using general rule:

(a) 730 + 998 (b) 796 – 314 (c) 12,904 +2,888 (d) 28,292 – 21,496

Make ten more such examples of addition, subtraction and estimation of their outcome.

2. Give a rough estimate (by rounding off to nearest hundreds) and also a closer estimate

(by rounding off to nearest tens) :

(a) 439 + 334 + 4,317

(b) 1,08,734 – 47,599

(c) 8325 – 491

(d) 4,89,348 – 48,365

Make four more such examples.

3. Estimate the following products using general rule:

(a) 578 × 161

(b) 5281 × 3491

(c) 1291 × 592

(d) 9250 × 29

Make four more such examples.

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### Mathematics Chapter List

1. Knowing Our Numbers

2. Whole Numbers

3. Playing with Numbers

4. Basic Geometrical Ideas

5. Understanding Elementary Shapes

6. Integers

7. Fractions

8. Decimals

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