Year 6 Estimating Sums, Differences and Products Worksheet — Level 2 — Practice Set 2 — 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 2 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 638 + 167 by rounding each number to the nearest 100.
Answer: 800
- 638 rounds to 600; 167 rounds to 200
- 600 + 200 = 800
The exact answer is 805, close to the estimate.
2.Estimate 49 × 5 by rounding 49 to the nearest 10.
Answer: 250
- 49 rounds to 50
- 50 × 5 = 250
The exact answer is 245.
3.Estimate 720 + 125 by rounding each number to the nearest 100.
Answer: 800
- 720 rounds to 700; 125 rounds to 100
- 700 + 100 = 800
The exact answer is 845, close to the estimate.
4.Estimate 78 × 4 by rounding 78 to the nearest 10.
Answer: 320
- 78 rounds to 80
- 80 × 4 = 320
The exact answer is 312.
5.Estimate 911 − 843 by rounding each number to the nearest 100.
Answer: 100
- 911 rounds to 900; 843 rounds to 800
- 900 − 800 = 100
The exact answer is 68, close to the estimate.
6.Estimate 34 × 4 by rounding 34 to the nearest 10.
Answer: 120
- 34 rounds to 30
- 30 × 4 = 120
The exact answer is 136.
7.Estimate 937 − 703 by rounding each number to the nearest 100.
Answer: 200
- 937 rounds to 900; 703 rounds to 700
- 900 − 700 = 200
The exact answer is 234, close to the estimate.
8.Estimate 71 × 7 by rounding 71 to the nearest 10.
Answer: 490
- 71 rounds to 70
- 70 × 7 = 490
The exact answer is 497.
9.Estimate 524 + 451 by rounding each number to the nearest 100.
Answer: 1,000
- 524 rounds to 500; 451 rounds to 500
- 500 + 500 = 1,000
The exact answer is 975, close to the estimate.
10.Estimate 63 × 4 by rounding 63 to the nearest 10.
Answer: 240
- 63 rounds to 60
- 60 × 4 = 240
The exact answer is 252.
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.