4th Grade Estimating Sums, Differences and Products Worksheet — Level 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 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 6,541 − 1,307 by rounding each number to the nearest 1,000.
Answer: 6,000
- 6,541 rounds to 7,000; 1,307 rounds to 1,000
- 7,000 − 1,000 = 6,000
The exact answer is 5,234, close to the estimate.
2.Estimate 26 × 67 by rounding each number to the nearest 10.
Answer: 2,100
- 26 rounds to 30; 67 rounds to 70
- 30 × 70 = 2,100
The exact answer is 1,742.
3.Estimate 99 × 3 by rounding 99 to the nearest 10.
Answer: 300
- 99 rounds to 100
- 100 × 3 = 300
The exact answer is 297.
4.Estimate 2,694 + 8,839 by rounding each number to the nearest 1,000.
Answer: 12,000
- 2,694 rounds to 3,000; 8,839 rounds to 9,000
- 3,000 + 9,000 = 12,000
The exact answer is 11,533, close to the estimate.
5.Estimate 23 × 37 by rounding each number to the nearest 10.
Answer: 800
- 23 rounds to 20; 37 rounds to 40
- 20 × 40 = 800
The exact answer is 851.
6.Estimate 84 × 83 by rounding each number to the nearest 10.
Answer: 6,400
- 84 rounds to 80; 83 rounds to 80
- 80 × 80 = 6,400
The exact answer is 6,972.
7.Estimate 6,596 − 4,171 by rounding each number to the nearest 1,000.
Answer: 3,000
- 6,596 rounds to 7,000; 4,171 rounds to 4,000
- 7,000 − 4,000 = 3,000
The exact answer is 2,425, close to the estimate.
8.Estimate 13 × 18 by rounding each number to the nearest 10.
Answer: 200
- 13 rounds to 10; 18 rounds to 20
- 10 × 20 = 200
The exact answer is 234.
9.Estimate 19 × 72 by rounding each number to the nearest 10.
Answer: 1,400
- 19 rounds to 20; 72 rounds to 70
- 20 × 70 = 1,400
The exact answer is 1,368.
10.Estimate 4,320 + 2,023 by rounding each number to the nearest 100.
Answer: 6,300
- 4,320 rounds to 4,300; 2,023 rounds to 2,000
- 4,300 + 2,000 = 6,300
The exact answer is 6,343, close to the estimate.
Marking tips
- Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
- For open-ended tasks, use the success criteria as a checklist rather than looking for one "right" answer.
- Celebrate what went well first, then pick one thing to work on next.