ICSE Class 5 Maths Exercise 1 Solved Answers

Hello students , In this article we will solve and learn ICSE Class 5th Exercise 1 all Question and Answers with details Solutions.

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1. Aug 2026
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Hello students , In this article we will solve and learn ICSE Class 5th Exercise 1 all Question and Answers with details.

A. Write the following in figures in the Indian system.

1. Fifty Thousand, two hundred and four

Solution

The number "Fifty thousand, two hundred and four" can be written as 50,204.

Here is the breakdown by place value:

Fifty thousand = 50,000 (50 × 1,000) Two hundred = 200 (2 × 100) Four = 4

Putting it all together, we get:

50,000 + 200 + 4 = 50,204

2.  Eight lakh, ten thousand, three hundred and fifteen

Solution

The number "Eight lakh, ten thousand, three hundred and fifteen" can be written as 810,315.

Here is the breakdown by place value:

8 lakh = 800,000 (8 × 100,000) 10 thousand = 10,000 (10 × 1,000) 3 hundred = 300 (3 × 100) 15 = 15

Putting it all together, we get:

810,000 + 10,000 + 300 + 15 = 810,315

3. Forty-three lakhs, fifteen thouand, eight hundred and five  

Solution -

The number "Forty-three lakhs, fifteen thousand, eight hundred and five" can be written as 43,15,805.

Here is the breakdown by place value:

43 lakhs = 43,00,000 (43 × 1,00,000) 15 thousand = 15,000 (15 × 1,000) 8 hundred = 800 (8 × 100) 5 = 5

Putting it all together, we get:

43,00,000 + 15,000 + 800 + 5 = 43,15,805

4. Six Crore, ten lakh, thirteen thousand, two hundred and eleven

Solution

The number "Six Crore, ten lakh, thirteen thousand, two hundred and eleven" can be written as 6,10,13,211.

Here is the breakdown by place value:

Six Crore = 6,00,00,000 (6 × 1,00,00,000) Ten lakh = 10,00,000 (10 × 1,00,000) Thirteen thousand = 13,000 (13 × 1,000) Two hundred = 200 (2 × 100) Eleven = 11

Putting it all together, we get:

6,00,00,000 + 10,00,000 + 13,000 + 200 + 11 = 6,10,13,211

 5. Eighteen Crore, fifteen lakh nine thousand, three hundred and Six

Solution  

The number "Eighteen Crore, fifteen lakh, nine thousand, three hundred and six" can be written as 18,15,09,306.

Here is the breakdown by place value:

Eighteen Crore = 18,00,00,000 (18 × 1,00,00,000) Fifteen lakh = 15,00,000 (15 × 1,00,000) Nine thousand = 9,000 (9 × 1,000) Three hundred = 300 (3 × 100) Six = 6

Putting it all together, we get:

18,00,00,000 + 15,00,000 + 9,000 + 300 + 6 = 18,15,09,306

6. Forty-two lakh, three thousand, two hundred and nine

Solution

The number "Forty-two lakh, three thousand, two hundred and nine" can be written as 42,03,209.

Here is the breakdown by place value:

Forty-two lakh = 42,00,000 (42 × 1,00,000) Three thousand = 3,000 (3 × 1,000) Two hundred = 200 (2 × 100) Nine = 9

Putting it all together, we get:

42,00,000 + 3,000 + 200 + 9 = 42,03,209

B. Rewrite the following numbers placing comma (,) as per the Indian System.

1, 645367 - 6,45,367

2. 503012689 - 503,01,26,89

3. 436405 - 4,36,405

4. 3268431 - 32,68,431

5. 2414360 - 24,14,360

6. 246079432 - 24,60,79,432

7. 12687393 - 1,26,87,393

8. 64283217 - 6,42,83,217

9. 543268321 - 54,32,68,321

10. 303669409 - 3,03,66,94,09   

You can solve other question in this Exercise by yourself with same methods, if you have any issue you can comment here, we will response soon.

 

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