Page 20 - ICSE Math 4
P. 20
Rounding Off to the Nearest 1,000
To round off numbers to the nearest 1,000, look at the digits at the hundreds place.
• If it is 4 or less, then write zeros at the hundreds, tens and ones places. Keep the
digits at other places as it is.
• If it is 5 or more, then write zeros at the hundreds, tens and ones places. Also, add 1
to the digit at the thousands place.
Example 15: Round off (a) 6,578 and (b) 24,352 to the nearest 1,000.
Solu on: (a) 6,578 is rounded off to 7,000 since the digit at the hundreds place is 5.
(b) 24,352 is rounded off to 24,000 since the digit at the hundreds place is 3.
Exercise 1.4
1. Round off the given numbers to the nearest 10.
(a) 547 (b) 6,912 (c) 43,785 (d) 1,90,273
2. Round off the given numbers to the nearest 100.
(a) 496 (b) 7,319 (c) 75,849 (d) 4,46,755
3. Round off the given numbers to the nearest 1,000.
(a) 7,435 (b) 12,752 (c) 4,75,926 (d) 8,99,128
Review Exercise
1. Represent the following numbers on the abacus.
(a) 54,208 (b) 8,42,739
2. Group the following numbers by pu ng commas as per the Indian number system
and write their number names.
(a) 6475 (b) 92087 (c) 549306 (d) 127458
3. Write the following numbers in expanded form, in numbers and in words.
(a) 8,347 (b) 15,209 (c) 7,53,621 (d) 7,35,438
4. Arrange the following numbers in ascending order.
(a) 32,491; 31,491; 38,149; 32,149; 31,941
(b) 9,82,467; 9,82,476; 8,93,756; 8,99,324; 9,92,946
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