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 5,602 + 7,015 by rounding each number to the nearest 1,000.
Answer: 13,000
- 5,602 rounds to 6,000; 7,015 rounds to 7,000
- 6,000 + 7,000 = 13,000
The exact answer is 12,617, close to the estimate.
2.Estimate 36 × 68 by rounding each number to the nearest 10.
Answer: 2,800
- 36 rounds to 40; 68 rounds to 70
- 40 × 70 = 2,800
The exact answer is 2,448.
3.Estimate 42 × 12 by rounding each number to the nearest 10.
Answer: 400
- 42 rounds to 40; 12 rounds to 10
- 40 × 10 = 400
The exact answer is 504.
4.Estimate 9,064 + 5,745 by rounding each number to the nearest 100.
Answer: 14,800
- 9,064 rounds to 9,100; 5,745 rounds to 5,700
- 9,100 + 5,700 = 14,800
The exact answer is 14,809, close to the estimate.
5.Estimate 79 × 39 by rounding each number to the nearest 10.
Answer: 3,200
- 79 rounds to 80; 39 rounds to 40
- 80 × 40 = 3,200
The exact answer is 3,081.
6.Estimate 52 × 61 by rounding each number to the nearest 10.
Answer: 3,000
- 52 rounds to 50; 61 rounds to 60
- 50 × 60 = 3,000
The exact answer is 3,172.
7.Estimate 6,022 − 2,566 by rounding each number to the nearest 1,000.
Answer: 3,000
- 6,022 rounds to 6,000; 2,566 rounds to 3,000
- 6,000 − 3,000 = 3,000
The exact answer is 3,456, close to the estimate.
8.Estimate 44 × 19 by rounding each number to the nearest 10.
Answer: 800
- 44 rounds to 40; 19 rounds to 20
- 40 × 20 = 800
The exact answer is 836.
9.Estimate 71 × 86 by rounding each number to the nearest 10.
Answer: 6,300
- 71 rounds to 70; 86 rounds to 90
- 70 × 90 = 6,300
The exact answer is 6,106.
10.Estimate 6,474 + 2,505 by rounding each number to the nearest 1,000.
Answer: 9,000
- 6,474 rounds to 6,000; 2,505 rounds to 3,000
- 6,000 + 3,000 = 9,000
The exact answer is 8,979, 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.