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 9,981 − 7,947 by rounding each number to the nearest 1,000.
Answer: 2,000
- 9,981 rounds to 10,000; 7,947 rounds to 8,000
- 10,000 − 8,000 = 2,000
The exact answer is 2,034, close to the estimate.
2.Estimate 73 × 86 by rounding each number to the nearest 10.
Answer: 6,300
- 73 rounds to 70; 86 rounds to 90
- 70 × 90 = 6,300
The exact answer is 6,278.
3.Estimate 88 × 3 by rounding 88 to the nearest 10.
Answer: 270
- 88 rounds to 90
- 90 × 3 = 270
The exact answer is 264.
4.Estimate 8,123 − 1,419 by rounding each number to the nearest 1,000.
Answer: 7,000
- 8,123 rounds to 8,000; 1,419 rounds to 1,000
- 8,000 − 1,000 = 7,000
The exact answer is 6,704, close to the estimate.
5.Estimate 52 × 76 by rounding each number to the nearest 10.
Answer: 4,000
- 52 rounds to 50; 76 rounds to 80
- 50 × 80 = 4,000
The exact answer is 3,952.
6.Estimate 36 × 6 by rounding 36 to the nearest 10.
Answer: 240
- 36 rounds to 40
- 40 × 6 = 240
The exact answer is 216.
7.Estimate 6,325 − 1,237 by rounding each number to the nearest 100.
Answer: 5,100
- 6,325 rounds to 6,300; 1,237 rounds to 1,200
- 6,300 − 1,200 = 5,100
The exact answer is 5,088, close to the estimate.
8.Estimate 14 × 65 by rounding each number to the nearest 10.
Answer: 700
- 14 rounds to 10; 65 rounds to 70
- 10 × 70 = 700
The exact answer is 910.
9.Estimate 71 × 3 by rounding 71 to the nearest 10.
Answer: 210
- 71 rounds to 70
- 70 × 3 = 210
The exact answer is 213.
10.Estimate 5,452 + 5,779 by rounding each number to the nearest 1,000.
Answer: 11,000
- 5,452 rounds to 5,000; 5,779 rounds to 6,000
- 5,000 + 6,000 = 11,000
The exact answer is 11,231, 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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