Year 6 Estimating Sums, Differences and Products Worksheet — Level 3 — 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 3 — Practice Set 2 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 2,772 + 1,162 by rounding each number to the nearest 100.
Answer: 4,000
- 2,772 rounds to 2,800; 1,162 rounds to 1,200
- 2,800 + 1,200 = 4,000
The exact answer is 3,934, close to the estimate.
2.Estimate 56 × 35 by rounding each number to the nearest 10.
Answer: 2,400
- 56 rounds to 60; 35 rounds to 40
- 60 × 40 = 2,400
The exact answer is 1,960.
3.Estimate 98 × 42 by rounding each number to the nearest 10.
Answer: 4,000
- 98 rounds to 100; 42 rounds to 40
- 100 × 40 = 4,000
The exact answer is 4,116.
4.Estimate 2,586 + 1,800 by rounding each number to the nearest 1,000.
Answer: 5,000
- 2,586 rounds to 3,000; 1,800 rounds to 2,000
- 3,000 + 2,000 = 5,000
The exact answer is 4,386, close to the estimate.
5.Estimate 32 × 24 by rounding each number to the nearest 10.
Answer: 600
- 32 rounds to 30; 24 rounds to 20
- 30 × 20 = 600
The exact answer is 768.
6.Estimate 28 × 6 by rounding 28 to the nearest 10.
Answer: 180
- 28 rounds to 30
- 30 × 6 = 180
The exact answer is 168.
7.Estimate 9,539 − 4,815 by rounding each number to the nearest 100.
Answer: 4,700
- 9,539 rounds to 9,500; 4,815 rounds to 4,800
- 9,500 − 4,800 = 4,700
The exact answer is 4,724, close to the estimate.
8.Estimate 46 × 53 by rounding each number to the nearest 10.
Answer: 2,500
- 46 rounds to 50; 53 rounds to 50
- 50 × 50 = 2,500
The exact answer is 2,438.
9.Estimate 26 × 94 by rounding each number to the nearest 10.
Answer: 2,700
- 26 rounds to 30; 94 rounds to 90
- 30 × 90 = 2,700
The exact answer is 2,444.
10.Estimate 8,218 − 6,458 by rounding each number to the nearest 100.
Answer: 1,700
- 8,218 rounds to 8,200; 6,458 rounds to 6,500
- 8,200 − 6,500 = 1,700
The exact answer is 1,760, close to the estimate.
Marking tips
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