4th Grade Estimating Sums, Differences and Products Worksheet — Level 3 — Practice Set 3 — 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 3 — Practice Set 3 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 9,188 − 5,984 by rounding each number to the nearest 1,000.
Answer: 3,000
- 9,188 rounds to 9,000; 5,984 rounds to 6,000
- 9,000 − 6,000 = 3,000
The exact answer is 3,204, close to the estimate.
2.Estimate 81 × 66 by rounding each number to the nearest 10.
Answer: 5,600
- 81 rounds to 80; 66 rounds to 70
- 80 × 70 = 5,600
The exact answer is 5,346.
3.Estimate 17 × 58 by rounding each number to the nearest 10.
Answer: 1,200
- 17 rounds to 20; 58 rounds to 60
- 20 × 60 = 1,200
The exact answer is 986.
4.Estimate 4,553 + 2,071 by rounding each number to the nearest 100.
Answer: 6,700
- 4,553 rounds to 4,600; 2,071 rounds to 2,100
- 4,600 + 2,100 = 6,700
The exact answer is 6,624, close to the estimate.
5.Estimate 48 × 97 by rounding each number to the nearest 10.
Answer: 5,000
- 48 rounds to 50; 97 rounds to 100
- 50 × 100 = 5,000
The exact answer is 4,656.
6.Estimate 17 × 3 by rounding 17 to the nearest 10.
Answer: 60
- 17 rounds to 20
- 20 × 3 = 60
The exact answer is 51.
7.Estimate 3,288 − 2,520 by rounding each number to the nearest 100.
Answer: 800
- 3,288 rounds to 3,300; 2,520 rounds to 2,500
- 3,300 − 2,500 = 800
The exact answer is 768, close to the estimate.
8.Estimate 92 × 19 by rounding each number to the nearest 10.
Answer: 1,800
- 92 rounds to 90; 19 rounds to 20
- 90 × 20 = 1,800
The exact answer is 1,748.
9.Estimate 69 × 9 by rounding 69 to the nearest 10.
Answer: 630
- 69 rounds to 70
- 70 × 9 = 630
The exact answer is 621.
10.Estimate 1,263 + 8,252 by rounding each number to the nearest 1,000.
Answer: 9,000
- 1,263 rounds to 1,000; 8,252 rounds to 8,000
- 1,000 + 8,000 = 9,000
The exact answer is 9,515, close to the estimate.
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