Year 6 Estimating Sums, Differences and Products Worksheet — Level 3 — Answers
Answer sheet with worked solutions for the Year 6 place value worksheet.
Success TutoringWorksheetsAnswer sheetYear 6 · Mathematics · Place ValueYear 6 Estimating Sums, Differences and Products Worksheet — Level 3 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 2,587 − 2,234 by rounding each number to the nearest 100.
Answer: 400
- 2,587 rounds to 2,600; 2,234 rounds to 2,200
- 2,600 − 2,200 = 400
The exact answer is 353, close to the estimate.
2.Estimate 21 × 92 by rounding each number to the nearest 10.
Answer: 1,800
- 21 rounds to 20; 92 rounds to 90
- 20 × 90 = 1,800
The exact answer is 1,932.
3.Estimate 57 × 12 by rounding each number to the nearest 10.
Answer: 600
- 57 rounds to 60; 12 rounds to 10
- 60 × 10 = 600
The exact answer is 684.
4.Estimate 4,107 + 1,136 by rounding each number to the nearest 100.
Answer: 5,200
- 4,107 rounds to 4,100; 1,136 rounds to 1,100
- 4,100 + 1,100 = 5,200
The exact answer is 5,243, close to the estimate.
5.Estimate 31 × 89 by rounding each number to the nearest 10.
Answer: 2,700
- 31 rounds to 30; 89 rounds to 90
- 30 × 90 = 2,700
The exact answer is 2,759.
6.Estimate 51 × 7 by rounding 51 to the nearest 10.
Answer: 350
- 51 rounds to 50
- 50 × 7 = 350
The exact answer is 357.
7.Estimate 7,753 + 3,069 by rounding each number to the nearest 100.
Answer: 10,900
- 7,753 rounds to 7,800; 3,069 rounds to 3,100
- 7,800 + 3,100 = 10,900
The exact answer is 10,822, close to the estimate.
8.Estimate 51 × 32 by rounding each number to the nearest 10.
Answer: 1,500
- 51 rounds to 50; 32 rounds to 30
- 50 × 30 = 1,500
The exact answer is 1,632.
9.Estimate 38 × 4 by rounding 38 to the nearest 10.
Answer: 160
- 38 rounds to 40
- 40 × 4 = 160
The exact answer is 152.
10.Estimate 2,509 + 3,406 by rounding each number to the nearest 100.
Answer: 5,900
- 2,509 rounds to 2,500; 3,406 rounds to 3,400
- 2,500 + 3,400 = 5,900
The exact answer is 5,915, close to the estimate.
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.