Page 10 - Start Up Mathematics_5

5 Write the place value of the underlined digit.
5 hundred or 500
(a) 34,508 ______________________ (b) 8,05,680 ______________________
(c) 73,692 ______________________ (d) 9,54,316 ______________________

6 Write the number names in the International number system.

(a) 932,431 (b) 37,340 (c) 481,234 (d) 516,074

7 Write 5,80,518 and 74,983 in the expanded form.

8 Arrange in ascending order.

(a) 4,30,395; 4,20,817; 4,53,164; 4,52,164 (b) 178,421; 78,375; 176,240; 275,189

9 Round off the given numbers to the nearest 100.

(a) 1,90,374 (b) 8,99,128 (c) 7,012 (d) 43,986

10 Round off the given numbers to the nearest 1,000.

(a) 8,453 (b) 23,863 (c) 5,86,037 (d) 9,00,239

Counting up to Crores

The largest 7-digit number is 99,99,999. It is read as ninety-nine lakh ninety-nine thousand
nine hundred ninety-nine.

99,99,999 + 1 = 1,00,00,000 which is the smallest 8-digit number. It is read as one crore.
The largest 8-digit number is 9,99,99,999. It is read as nine crore ninety-nine lakh ninety-nine
thousand nine hundred ninety-nine.

9,99,99,999 + 1 = 10,00,00,000 which is the smallest 9-digit number. It is read as ten crores.

Including crores, our place value chart will look like this.

CRORES LAKHS THOUSANDS ONES

Ten Ten
crores Crores Ten lakhs Lakhs thousands Thousands Hundreds Tens Ones
(TC) (C) (TL) (L) (TTh) (Th) (H) (T) (O)

To write a large number such as 38546213, put commas to separate the periods of ones,
thousands, lakhs and crores.
3,85,46,213 Quick Tip
Ones
Starting from the extreme
Thousands right, put commas after

Lakhs the 3rd, 5th and 7th digits
as you move left.
Crores

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