Year 4 Estimating Sums, Differences and Products Worksheet — Level 2 — Practice Set 3 — Answers
Answer sheet with worked solutions for the Year 4 place value worksheet.
Success TutoringWorksheetsAnswer sheetYear 4 · Mathematics · Place ValueYear 4 Estimating Sums, Differences and Products Worksheet — Level 2 — Practice Set 3 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 660 − 369 by rounding each number to the nearest 100.
Answer: 300
- 660 rounds to 700; 369 rounds to 400
- 700 − 400 = 300
The exact answer is 291, close to the estimate.
2.Estimate 62 × 8 by rounding 62 to the nearest 10.
Answer: 480
- 62 rounds to 60
- 60 × 8 = 480
The exact answer is 496.
3.Estimate 467 − 237 by rounding each number to the nearest 100.
Answer: 300
- 467 rounds to 500; 237 rounds to 200
- 500 − 200 = 300
The exact answer is 230, close to the estimate.
4.Estimate 48 × 6 by rounding 48 to the nearest 10.
Answer: 300
- 48 rounds to 50
- 50 × 6 = 300
The exact answer is 288.
5.Estimate 637 − 108 by rounding each number to the nearest 100.
Answer: 500
- 637 rounds to 600; 108 rounds to 100
- 600 − 100 = 500
The exact answer is 529, close to the estimate.
6.Estimate 63 × 8 by rounding 63 to the nearest 10.
Answer: 480
- 63 rounds to 60
- 60 × 8 = 480
The exact answer is 504.
7.Estimate 344 − 135 by rounding each number to the nearest 100.
Answer: 200
- 344 rounds to 300; 135 rounds to 100
- 300 − 100 = 200
The exact answer is 209, close to the estimate.
8.Estimate 96 × 3 by rounding 96 to the nearest 10.
Answer: 300
- 96 rounds to 100
- 100 × 3 = 300
The exact answer is 288.
9.Estimate 884 + 276 by rounding each number to the nearest 100.
Answer: 1,200
- 884 rounds to 900; 276 rounds to 300
- 900 + 300 = 1,200
The exact answer is 1,160, close to the estimate.
10.Estimate 81 × 8 by rounding 81 to the nearest 10.
Answer: 640
- 81 rounds to 80
- 80 × 8 = 640
The exact answer is 648.
Marking tips
- Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
- For open-ended tasks, use the success criteria as a checklist rather than looking for one "right" answer.
- Celebrate what went well first, then pick one thing to work on next.