5th Grade Estimating Sums, Differences and Products Worksheet — Level 3 — Answers
Answer sheet with worked solutions for the 5th Grade place value worksheet.
Success TutoringWorksheetsAnswer sheet5th Grade · Mathematics · Place Value5th Grade Estimating Sums, Differences and Products Worksheet — Level 3 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 9,799 − 7,768 by rounding each number to the nearest 1,000.
Answer: 2,000
- 9,799 rounds to 10,000; 7,768 rounds to 8,000
- 10,000 − 8,000 = 2,000
The exact answer is 2,031, close to the estimate.
2.Estimate 55 × 41 by rounding each number to the nearest 10.
Answer: 2,400
- 55 rounds to 60; 41 rounds to 40
- 60 × 40 = 2,400
The exact answer is 2,255.
3.Estimate 42 × 12 by rounding each number to the nearest 10.
Answer: 400
- 42 rounds to 40; 12 rounds to 10
- 40 × 10 = 400
The exact answer is 504.
4.Estimate 4,129 + 5,785 by rounding each number to the nearest 1,000.
Answer: 10,000
- 4,129 rounds to 4,000; 5,785 rounds to 6,000
- 4,000 + 6,000 = 10,000
The exact answer is 9,914, close to the estimate.
5.Estimate 95 × 51 by rounding each number to the nearest 10.
Answer: 5,000
- 95 rounds to 100; 51 rounds to 50
- 100 × 50 = 5,000
The exact answer is 4,845.
6.Estimate 49 × 66 by rounding each number to the nearest 10.
Answer: 3,500
- 49 rounds to 50; 66 rounds to 70
- 50 × 70 = 3,500
The exact answer is 3,234.
7.Estimate 2,503 − 1,029 by rounding each number to the nearest 100.
Answer: 1,500
- 2,503 rounds to 2,500; 1,029 rounds to 1,000
- 2,500 − 1,000 = 1,500
The exact answer is 1,474, close to the estimate.
8.Estimate 87 × 89 by rounding each number to the nearest 10.
Answer: 8,100
- 87 rounds to 90; 89 rounds to 90
- 90 × 90 = 8,100
The exact answer is 7,743.
9.Estimate 67 × 85 by rounding each number to the nearest 10.
Answer: 6,300
- 67 rounds to 70; 85 rounds to 90
- 70 × 90 = 6,300
The exact answer is 5,695.
10.Estimate 9,975 − 2,444 by rounding each number to the nearest 100.
Answer: 7,600
- 9,975 rounds to 10,000; 2,444 rounds to 2,400
- 10,000 − 2,400 = 7,600
The exact answer is 7,531, close to the estimate.
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