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
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