Page 122 - New Medley 3 Semester 1
P. 122
Example 6: Estimate 2924 + 3906 by rounding to nearest hundreds.
Solution: Rounding off to hundreds
2924 rounds to 2 9 0 0
3906 rounds to + 3 9 0 0
Estimated sum 6 8 0 0
Example 7: Estimate 5096 + 2895 by rounding to nearest thousands.
Solution: Rounding off to thousands
5096 rounds to 5 0 0 0
2895 rounds to + 3 0 0 0
Estimated sum 8 0 0 0
EXERCISE 2.5
A. Estimate the sum by rounding to nearest ten.
1. 2316 + 1423 2. 3569 + 5212
Estimate: + Estimate: +
= =
3. 1101 + 3841 4. 6577 + 1101
Estimate: + Estimate: +
= =
B. A library has 3215 story books and 6182 fiction books. Estimate the number
of books the library has by rounding to nearest tens.
C. Estimate the sum by rounding to nearest hundreds.
1. 5129 + 2099 2. 3102 + 4209
Estimate: + Estimate: +
= =
3. 7451 + 1231 4. 1569 + 2312
Estimate: + Estimate: +
= =
120
