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 93 − 66 by rounding each number to the nearest 10.
Answer: 20
- 93 rounds to 90; 66 rounds to 70
- 90 − 70 = 20
The exact answer is 27, close to the estimate.
2.Estimate 67 − 38 by rounding each number to the nearest 10.
Answer: 30
- 67 rounds to 70; 38 rounds to 40
- 70 − 40 = 30
The exact answer is 29, close to the estimate.
3.Estimate 52 − 44 by rounding each number to the nearest 10.
Answer: 10
- 52 rounds to 50; 44 rounds to 40
- 50 − 40 = 10
The exact answer is 8, close to the estimate.
4.Estimate 14 + 65 by rounding each number to the nearest 10.
Answer: 80
- 14 rounds to 10; 65 rounds to 70
- 10 + 70 = 80
The exact answer is 79, close to the estimate.
5.Estimate 87 − 57 by rounding each number to the nearest 10.
Answer: 30
- 87 rounds to 90; 57 rounds to 60
- 90 − 60 = 30
The exact answer is 30, close to the estimate.
6.Estimate 17 + 63 by rounding each number to the nearest 10.
Answer: 80
- 17 rounds to 20; 63 rounds to 60
- 20 + 60 = 80
The exact answer is 80, close to the estimate.
7.Estimate 91 − 47 by rounding each number to the nearest 10.
Answer: 40
- 91 rounds to 90; 47 rounds to 50
- 90 − 50 = 40
The exact answer is 44, close to the estimate.
8.Estimate 66 + 59 by rounding each number to the nearest 10.
Answer: 130
- 66 rounds to 70; 59 rounds to 60
- 70 + 60 = 130
The exact answer is 125, close to the estimate.
9.Estimate 61 − 18 by rounding each number to the nearest 10.
Answer: 40
- 61 rounds to 60; 18 rounds to 20
- 60 − 20 = 40
The exact answer is 43, close to the estimate.
10.Estimate 55 − 54 by rounding each number to the nearest 10.
Answer: 10
- 55 rounds to 60; 54 rounds to 50
- 60 − 50 = 10
The exact answer is 1, close to the estimate.
Marking tips
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