RS Aggarwal Vikash Aggarwal Class 4 Activity Book Composite Mathematics Activity Sheet 51 Solution
Activity Sheet – 51
Estimate the given sums by rounding off two-digit addends to the nearest ten, three-digit address to the nearest hundred and addends four or more digits to the nearest thousand:
Problem | Rounded Numbers | Estimated Sum | |
1 | 54 +77 | 50 + 80 | 130 |
2 | 43 + 69 | 40 + 70 | 110 |
3 | 86 + 62 | 90 + 60 | 150 |
4 | 91 + 46 | 90 + 50 | 140 |
5 | 48 + 79 | 50 + 80 | 130 |
6 | 376 + 435 | 400 + 400 | 800 |
7 | 814 + 588 | 800 + 600 | 1400 |
8 | 409 + 517 | 400 + 500 | 900 |
9 | 345 + 679 + 412 | 300 + 700 + 400 | 1400 |
10 | 867 + 224 + 585 | 900 + 200 + 600 | 1700 |
11 | 2169 + 4136 | 2000 + 4000 | 6000 |
12 | 1943 + 6658 | 2000 + 7000 | 9000 |
13 | 4257 + 7765 | 4000 + 8000 | 12000 |
14 | 18188 + 68686 | 18000 + 69000 | 87000 |