RS Aggarwal Vikash Aggarwal Class 4 Activity Book Composite Mathematics Activity Sheet 52 Solution
Activity Sheet – 52
Estimate the given differences by rounding off two-digit numbers to the nearest ten, three-digit numbers to the nearest hundred and numbers with four or more digits to the nearest thousand.
| Problem | Rounded numbers | Estimated difference | |
| 1 | 67 – 46 | 70 – 50 | 20 |
| 2 | 82 – 29 | 80 – 30 | 50 |
| 3 | 96 – 38 | 100 – 40 | 60 |
| 4 | 597 – 345 | 600 – 300 | 300 |
| 5 | 616 – 288 | 600 – 300 | 300 |
| 6 | 7075 – 1097 | 7000 – 1000 | 6000 |
| 7 | 9336 – 3871 | 9000 – 4000 | 5000 |
| 8 | 1023 – 487 | 1000 – 500 | 500 |
| 9 | 26666 – 11589 | 27000 – 12000 | 15000 |
| 10 | 54865 – 17278 | 55000 – 17000 | 38000 |
| 11 | 23134 – 7756 | 23000 – 8000 | 35000 |
| 12 | 75852 – 9197 | 76000 – 9000 | 67000 |