Year 6 Estimating Sums, Differences and Products Worksheet — Level 1 — 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 1 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 86 + 41 by rounding each number to the nearest 10.
Answer: 130
- 86 rounds to 90; 41 rounds to 40
- 90 + 40 = 130
The exact answer is 127, close to the estimate.
2.Estimate 19 + 88 by rounding each number to the nearest 10.
Answer: 110
- 19 rounds to 20; 88 rounds to 90
- 20 + 90 = 110
The exact answer is 107, close to the estimate.
3.Estimate 29 + 43 by rounding each number to the nearest 10.
Answer: 70
- 29 rounds to 30; 43 rounds to 40
- 30 + 40 = 70
The exact answer is 72, close to the estimate.
4.Estimate 49 − 29 by rounding each number to the nearest 10.
Answer: 20
- 49 rounds to 50; 29 rounds to 30
- 50 − 30 = 20
The exact answer is 20, close to the estimate.
5.Estimate 86 − 45 by rounding each number to the nearest 10.
Answer: 40
- 86 rounds to 90; 45 rounds to 50
- 90 − 50 = 40
The exact answer is 41, close to the estimate.
6.Estimate 42 + 35 by rounding each number to the nearest 10.
Answer: 80
- 42 rounds to 40; 35 rounds to 40
- 40 + 40 = 80
The exact answer is 77, close to the estimate.
7.Estimate 83 − 74 by rounding each number to the nearest 10.
Answer: 10
- 83 rounds to 80; 74 rounds to 70
- 80 − 70 = 10
The exact answer is 9, close to the estimate.
8.Estimate 59 + 32 by rounding each number to the nearest 10.
Answer: 90
- 59 rounds to 60; 32 rounds to 30
- 60 + 30 = 90
The exact answer is 91, close to the estimate.
9.Estimate 62 + 47 by rounding each number to the nearest 10.
Answer: 110
- 62 rounds to 60; 47 rounds to 50
- 60 + 50 = 110
The exact answer is 109, close to the estimate.
10.Estimate 11 + 74 by rounding each number to the nearest 10.
Answer: 80
- 11 rounds to 10; 74 rounds to 70
- 10 + 70 = 80
The exact answer is 85, close to the estimate.
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