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 49 − 27 by rounding each number to the nearest 10.
Answer: 20
- 49 rounds to 50; 27 rounds to 30
- 50 − 30 = 20
The exact answer is 22, close to the estimate.
2.Estimate 38 + 52 by rounding each number to the nearest 10.
Answer: 90
- 38 rounds to 40; 52 rounds to 50
- 40 + 50 = 90
The exact answer is 90, close to the estimate.
3.Estimate 88 − 71 by rounding each number to the nearest 10.
Answer: 20
- 88 rounds to 90; 71 rounds to 70
- 90 − 70 = 20
The exact answer is 17, close to the estimate.
4.Estimate 14 + 88 by rounding each number to the nearest 10.
Answer: 100
- 14 rounds to 10; 88 rounds to 90
- 10 + 90 = 100
The exact answer is 102, close to the estimate.
5.Estimate 26 + 89 by rounding each number to the nearest 10.
Answer: 120
- 26 rounds to 30; 89 rounds to 90
- 30 + 90 = 120
The exact answer is 115, close to the estimate.
6.Estimate 24 + 23 by rounding each number to the nearest 10.
Answer: 40
- 24 rounds to 20; 23 rounds to 20
- 20 + 20 = 40
The exact answer is 47, close to the estimate.
7.Estimate 31 + 32 by rounding each number to the nearest 10.
Answer: 60
- 31 rounds to 30; 32 rounds to 30
- 30 + 30 = 60
The exact answer is 63, close to the estimate.
8.Estimate 44 − 15 by rounding each number to the nearest 10.
Answer: 20
- 44 rounds to 40; 15 rounds to 20
- 40 − 20 = 20
The exact answer is 29, close to the estimate.
9.Estimate 76 + 55 by rounding each number to the nearest 10.
Answer: 140
- 76 rounds to 80; 55 rounds to 60
- 80 + 60 = 140
The exact answer is 131, close to the estimate.
10.Estimate 68 + 94 by rounding each number to the nearest 10.
Answer: 160
- 68 rounds to 70; 94 rounds to 90
- 70 + 90 = 160
The exact answer is 162, close to the estimate.
Marking tips
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