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 6,616 + 5,115 by rounding each number to the nearest 1,000.
Answer: 12,000
- 6,616 rounds to 7,000; 5,115 rounds to 5,000
- 7,000 + 5,000 = 12,000
The exact answer is 11,731, close to the estimate.
2.Estimate 24 × 53 by rounding each number to the nearest 10.
Answer: 1,000
- 24 rounds to 20; 53 rounds to 50
- 20 × 50 = 1,000
The exact answer is 1,272.
3.Estimate 69 × 9 by rounding 69 to the nearest 10.
Answer: 630
- 69 rounds to 70
- 70 × 9 = 630
The exact answer is 621.
4.Estimate 8,163 − 5,993 by rounding each number to the nearest 1,000.
Answer: 2,000
- 8,163 rounds to 8,000; 5,993 rounds to 6,000
- 8,000 − 6,000 = 2,000
The exact answer is 2,170, close to the estimate.
5.Estimate 61 × 67 by rounding each number to the nearest 10.
Answer: 4,200
- 61 rounds to 60; 67 rounds to 70
- 60 × 70 = 4,200
The exact answer is 4,087.
6.Estimate 94 × 17 by rounding each number to the nearest 10.
Answer: 1,800
- 94 rounds to 90; 17 rounds to 20
- 90 × 20 = 1,800
The exact answer is 1,598.
7.Estimate 3,245 + 5,052 by rounding each number to the nearest 1,000.
Answer: 8,000
- 3,245 rounds to 3,000; 5,052 rounds to 5,000
- 3,000 + 5,000 = 8,000
The exact answer is 8,297, close to the estimate.
8.Estimate 38 × 67 by rounding each number to the nearest 10.
Answer: 2,800
- 38 rounds to 40; 67 rounds to 70
- 40 × 70 = 2,800
The exact answer is 2,546.
9.Estimate 45 × 4 by rounding 45 to the nearest 10.
Answer: 200
- 45 rounds to 50
- 50 × 4 = 200
The exact answer is 180.
10.Estimate 2,611 + 6,451 by rounding each number to the nearest 100.
Answer: 9,100
- 2,611 rounds to 2,600; 6,451 rounds to 6,500
- 2,600 + 6,500 = 9,100
The exact answer is 9,062, 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.
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