Year 6 Estimating Sums, Differences and Products Worksheet — Level 3 — Practice Set 4 — 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 4 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 9,693 − 1,085 by rounding each number to the nearest 1,000.
Answer: 9,000
- 9,693 rounds to 10,000; 1,085 rounds to 1,000
- 10,000 − 1,000 = 9,000
The exact answer is 8,608, close to the estimate.
2.Estimate 99 × 72 by rounding each number to the nearest 10.
Answer: 7,000
- 99 rounds to 100; 72 rounds to 70
- 100 × 70 = 7,000
The exact answer is 7,128.
3.Estimate 73 × 3 by rounding 73 to the nearest 10.
Answer: 210
- 73 rounds to 70
- 70 × 3 = 210
The exact answer is 219.
4.Estimate 8,448 + 5,475 by rounding each number to the nearest 100.
Answer: 13,900
- 8,448 rounds to 8,400; 5,475 rounds to 5,500
- 8,400 + 5,500 = 13,900
The exact answer is 13,923, close to the estimate.
5.Estimate 64 × 27 by rounding each number to the nearest 10.
Answer: 1,800
- 64 rounds to 60; 27 rounds to 30
- 60 × 30 = 1,800
The exact answer is 1,728.
6.Estimate 83 × 16 by rounding each number to the nearest 10.
Answer: 1,600
- 83 rounds to 80; 16 rounds to 20
- 80 × 20 = 1,600
The exact answer is 1,328.
7.Estimate 6,110 − 2,085 by rounding each number to the nearest 1,000.
Answer: 4,000
- 6,110 rounds to 6,000; 2,085 rounds to 2,000
- 6,000 − 2,000 = 4,000
The exact answer is 4,025, close to the estimate.
8.Estimate 47 × 66 by rounding each number to the nearest 10.
Answer: 3,500
- 47 rounds to 50; 66 rounds to 70
- 50 × 70 = 3,500
The exact answer is 3,102.
9.Estimate 44 × 17 by rounding each number to the nearest 10.
Answer: 800
- 44 rounds to 40; 17 rounds to 20
- 40 × 20 = 800
The exact answer is 748.
10.Estimate 8,826 + 7,775 by rounding each number to the nearest 1,000.
Answer: 17,000
- 8,826 rounds to 9,000; 7,775 rounds to 8,000
- 9,000 + 8,000 = 17,000
The exact answer is 16,601, 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.