Year 6 Estimating Sums, Differences and Products Worksheet — Level 3 — 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 3 — Practice Set 3 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 5,422 − 4,259 by rounding each number to the nearest 1,000.
Answer: 1,000
- 5,422 rounds to 5,000; 4,259 rounds to 4,000
- 5,000 − 4,000 = 1,000
The exact answer is 1,163, close to the estimate.
2.Estimate 99 × 63 by rounding each number to the nearest 10.
Answer: 6,000
- 99 rounds to 100; 63 rounds to 60
- 100 × 60 = 6,000
The exact answer is 6,237.
3.Estimate 69 × 93 by rounding each number to the nearest 10.
Answer: 6,300
- 69 rounds to 70; 93 rounds to 90
- 70 × 90 = 6,300
The exact answer is 6,417.
4.Estimate 3,304 + 1,891 by rounding each number to the nearest 1,000.
Answer: 5,000
- 3,304 rounds to 3,000; 1,891 rounds to 2,000
- 3,000 + 2,000 = 5,000
The exact answer is 5,195, close to the estimate.
5.Estimate 88 × 67 by rounding each number to the nearest 10.
Answer: 6,300
- 88 rounds to 90; 67 rounds to 70
- 90 × 70 = 6,300
The exact answer is 5,896.
6.Estimate 69 × 8 by rounding 69 to the nearest 10.
Answer: 560
- 69 rounds to 70
- 70 × 8 = 560
The exact answer is 552.
7.Estimate 5,041 + 2,417 by rounding each number to the nearest 100.
Answer: 7,400
- 5,041 rounds to 5,000; 2,417 rounds to 2,400
- 5,000 + 2,400 = 7,400
The exact answer is 7,458, close to the estimate.
8.Estimate 71 × 55 by rounding each number to the nearest 10.
Answer: 4,200
- 71 rounds to 70; 55 rounds to 60
- 70 × 60 = 4,200
The exact answer is 3,905.
9.Estimate 87 × 6 by rounding 87 to the nearest 10.
Answer: 540
- 87 rounds to 90
- 90 × 6 = 540
The exact answer is 522.
10.Estimate 9,301 + 9,295 by rounding each number to the nearest 1,000.
Answer: 18,000
- 9,301 rounds to 9,000; 9,295 rounds to 9,000
- 9,000 + 9,000 = 18,000
The exact answer is 18,596, 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.