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# Exercise 2.3 (Importance of commas or periods)

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Exercise 2.3

1. Read the following numbers by placing the commas at appropriate periods and write their number names.

a. 15731997 b. 341964 c. 29121972 d. 347810

a. 1,57,31,997:

One crore fifty seven lakhs thirty one thousand nine hundred and ninety seven

b. 3,41,964:

Three lakhs forty one thousand nine hundred and sixty four

c. 2,91,21,972:

Two crores ninety one lakhs twenty one thousand nine hundred and seventy two.

d. 3,47,810:

Three lakhs forty seven thousand eight hundred and ten.

2. Write the place value of 5 in the following numbers.

a. 15731997

b. 341964

c. 29121972

d. 347810

Answer: The value of 5 in 15731997 is 5 × 1000000 = 5000000

3. Write the following in standard notation.

a. 30000 + 3000 + 300 + 30 + 3 = 33333

b. 200000 + 7000 + 7 = 207007

c. 8000000 + 70000 + 3000 +30 + 5 = 8073035

d. 4000000 + 400 + 4 = 4000404

4. Write the following numbers in expanded from.

a. 63,570 = 60000+3000+500+70

b. 36,01,478 = 3000000+600000+1000+400+70+8

c. 1,45,70,004 = 10000000+4000000+500000+70000+4

d. 28,48,387 = 2000000+800000+40000+8000+300+ 80 + 7

Tags : Numbers | Term 1 Chapter 2 | 5th Maths , 5th Maths : Term 1 Unit 2 : Numbers
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5th Maths : Term 1 Unit 2 : Numbers : Exercise 2.3 (Importance of commas or periods) | Numbers | Term 1 Chapter 2 | 5th Maths