Year 5 Estimating Sums, Differences and Products Worksheet — Level 2 — Answers
Answer sheet with worked solutions for the Year 5 place value worksheet.
Success TutoringWorksheetsAnswer sheetYear 5 · Mathematics · Place ValueYear 5 Estimating Sums, Differences and Products Worksheet — Level 2 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 705 + 984 by rounding each number to the nearest 100.
Answer: 1,700
- 705 rounds to 700; 984 rounds to 1,000
- 700 + 1,000 = 1,700
The exact answer is 1,689, close to the estimate.
2.Estimate 94 × 8 by rounding 94 to the nearest 10.
Answer: 720
- 94 rounds to 90
- 90 × 8 = 720
The exact answer is 752.
3.Estimate 639 + 265 by rounding each number to the nearest 100.
Answer: 900
- 639 rounds to 600; 265 rounds to 300
- 600 + 300 = 900
The exact answer is 904, close to the estimate.
4.Estimate 42 × 9 by rounding 42 to the nearest 10.
Answer: 360
- 42 rounds to 40
- 40 × 9 = 360
The exact answer is 378.
5.Estimate 786 − 587 by rounding each number to the nearest 100.
Answer: 200
- 786 rounds to 800; 587 rounds to 600
- 800 − 600 = 200
The exact answer is 199, close to the estimate.
6.Estimate 25 × 6 by rounding 25 to the nearest 10.
Answer: 180
- 25 rounds to 30
- 30 × 6 = 180
The exact answer is 150.
7.Estimate 915 − 227 by rounding each number to the nearest 100.
Answer: 700
- 915 rounds to 900; 227 rounds to 200
- 900 − 200 = 700
The exact answer is 688, close to the estimate.
8.Estimate 67 × 6 by rounding 67 to the nearest 10.
Answer: 420
- 67 rounds to 70
- 70 × 6 = 420
The exact answer is 402.
9.Estimate 447 + 188 by rounding each number to the nearest 100.
Answer: 600
- 447 rounds to 400; 188 rounds to 200
- 400 + 200 = 600
The exact answer is 635, close to the estimate.
10.Estimate 84 × 8 by rounding 84 to the nearest 10.
Answer: 640
- 84 rounds to 80
- 80 × 8 = 640
The exact answer is 672.
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.