Page 133 - New Medley 4 Semester 1
P. 133
Example 7: Estimate 277954 + 241888 by rounding to the nearest
hundreds.
Solution: Rounding off to hundreds
277954 rounds to 2 7 8 0 0 0
241888 rounds to + 2 4 1 9 0 0
Estimated sum 5 1 9 9 0 0
Example 8: Estimate 71708 + 77214 by rounding to the nearest
thousands.
Solution: Rounding off to thousands
71708 rounds to 7 2 0 0 0
77214 rounds to + 7 7 0 0 0
Estimated sum 1 4 9 0 0 0
Example 9: Estimate 745178 + 121199 by rounding to the nearest
ten thousands.
Solution: Rounding off to ten thousands
745178 rounds to 7 5 0 0 0 0
121199 rounds to + 1 2 0 0 0 0
Estimated sum 8 7 0 0 0 0
EXERCISE 2.4
A. Estimate the sum by rounding to the nearest tens.
1. 25873 + 14795
2. 175412 + 227146
3. A cricketer has made 20557 runs in test matches and 76997 runs in
one day matches. Nearly how many tens of runs has he made in all?
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