Year 6 Estimating Sums, Differences and Products Worksheet — Level 2 — Practice Set 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 2 — Practice Set 3 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 489 + 334 by rounding each number to the nearest 100.
Answer: 800
- 489 rounds to 500; 334 rounds to 300
- 500 + 300 = 800
The exact answer is 823, close to the estimate.
2.Estimate 89 × 3 by rounding 89 to the nearest 10.
Answer: 270
- 89 rounds to 90
- 90 × 3 = 270
The exact answer is 267.
3.Estimate 542 − 411 by rounding each number to the nearest 100.
Answer: 100
- 542 rounds to 500; 411 rounds to 400
- 500 − 400 = 100
The exact answer is 131, close to the estimate.
4.Estimate 13 × 3 by rounding 13 to the nearest 10.
Answer: 30
- 13 rounds to 10
- 10 × 3 = 30
The exact answer is 39.
5.Estimate 547 − 377 by rounding each number to the nearest 100.
Answer: 100
- 547 rounds to 500; 377 rounds to 400
- 500 − 400 = 100
The exact answer is 170, close to the estimate.
6.Estimate 12 × 7 by rounding 12 to the nearest 10.
Answer: 70
- 12 rounds to 10
- 10 × 7 = 70
The exact answer is 84.
7.Estimate 946 − 471 by rounding each number to the nearest 100.
Answer: 400
- 946 rounds to 900; 471 rounds to 500
- 900 − 500 = 400
The exact answer is 475, close to the estimate.
8.Estimate 83 × 9 by rounding 83 to the nearest 10.
Answer: 720
- 83 rounds to 80
- 80 × 9 = 720
The exact answer is 747.
9.Estimate 846 + 639 by rounding each number to the nearest 100.
Answer: 1,400
- 846 rounds to 800; 639 rounds to 600
- 800 + 600 = 1,400
The exact answer is 1,485, close to the estimate.
10.Estimate 62 × 9 by rounding 62 to the nearest 10.
Answer: 540
- 62 rounds to 60
- 60 × 9 = 540
The exact answer is 558.
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.