4th Grade Estimating Sums, Differences and Products Worksheet — Level 1 — Answers
Answer sheet with worked solutions for the 4th Grade place value worksheet.
Success TutoringWorksheetsAnswer sheet4th Grade · Mathematics · Place Value4th Grade Estimating Sums, Differences and Products Worksheet — Level 1 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 11 + 21 by rounding each number to the nearest 10.
Answer: 30
- 11 rounds to 10; 21 rounds to 20
- 10 + 20 = 30
The exact answer is 32, close to the estimate.
2.Estimate 66 − 42 by rounding each number to the nearest 10.
Answer: 30
- 66 rounds to 70; 42 rounds to 40
- 70 − 40 = 30
The exact answer is 24, close to the estimate.
3.Estimate 88 − 12 by rounding each number to the nearest 10.
Answer: 80
- 88 rounds to 90; 12 rounds to 10
- 90 − 10 = 80
The exact answer is 76, close to the estimate.
4.Estimate 53 − 16 by rounding each number to the nearest 10.
Answer: 30
- 53 rounds to 50; 16 rounds to 20
- 50 − 20 = 30
The exact answer is 37, close to the estimate.
5.Estimate 59 − 22 by rounding each number to the nearest 10.
Answer: 40
- 59 rounds to 60; 22 rounds to 20
- 60 − 20 = 40
The exact answer is 37, close to the estimate.
6.Estimate 64 − 28 by rounding each number to the nearest 10.
Answer: 30
- 64 rounds to 60; 28 rounds to 30
- 60 − 30 = 30
The exact answer is 36, close to the estimate.
7.Estimate 88 − 73 by rounding each number to the nearest 10.
Answer: 20
- 88 rounds to 90; 73 rounds to 70
- 90 − 70 = 20
The exact answer is 15, close to the estimate.
8.Estimate 72 + 26 by rounding each number to the nearest 10.
Answer: 100
- 72 rounds to 70; 26 rounds to 30
- 70 + 30 = 100
The exact answer is 98, close to the estimate.
9.Estimate 89 − 23 by rounding each number to the nearest 10.
Answer: 70
- 89 rounds to 90; 23 rounds to 20
- 90 − 20 = 70
The exact answer is 66, close to the estimate.
10.Estimate 48 − 19 by rounding each number to the nearest 10.
Answer: 30
- 48 rounds to 50; 19 rounds to 20
- 50 − 20 = 30
The exact answer is 29, close to the estimate.
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