4th Grade Estimating Sums, Differences and Products Worksheet — Level 2 — 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 2 — Answers
Round each number first, then work out the estimate in your head.
1.Estimate 804 + 708 by rounding each number to the nearest 100.
Answer: 1,500
- 804 rounds to 800; 708 rounds to 700
- 800 + 700 = 1,500
The exact answer is 1,512, close to the estimate.
2.Estimate 79 × 7 by rounding 79 to the nearest 10.
Answer: 560
- 79 rounds to 80
- 80 × 7 = 560
The exact answer is 553.
3.Estimate 293 + 990 by rounding each number to the nearest 100.
Answer: 1,300
- 293 rounds to 300; 990 rounds to 1,000
- 300 + 1,000 = 1,300
The exact answer is 1,283, close to the estimate.
4.Estimate 14 × 9 by rounding 14 to the nearest 10.
Answer: 90
- 14 rounds to 10
- 10 × 9 = 90
The exact answer is 126.
5.Estimate 559 − 228 by rounding each number to the nearest 100.
Answer: 400
- 559 rounds to 600; 228 rounds to 200
- 600 − 200 = 400
The exact answer is 331, close to the estimate.
6.Estimate 78 × 3 by rounding 78 to the nearest 10.
Answer: 240
- 78 rounds to 80
- 80 × 3 = 240
The exact answer is 234.
7.Estimate 357 − 344 by rounding each number to the nearest 100.
Answer: 100
- 357 rounds to 400; 344 rounds to 300
- 400 − 300 = 100
The exact answer is 13, close to the estimate.
8.Estimate 28 × 3 by rounding 28 to the nearest 10.
Answer: 90
- 28 rounds to 30
- 30 × 3 = 90
The exact answer is 84.
9.Estimate 976 − 622 by rounding each number to the nearest 100.
Answer: 400
- 976 rounds to 1,000; 622 rounds to 600
- 1,000 − 600 = 400
The exact answer is 354, close to the estimate.
10.Estimate 91 × 5 by rounding 91 to the nearest 10.
Answer: 450
- 91 rounds to 90
- 90 × 5 = 450
The exact answer is 455.
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.