Adding and taking away within 1000
Grade 3 · Level 3 · Sheet 1the answers
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- 1.378−305
- 2.204−101
- 3.884−212
- 4.55−13
- 5.497−182
- 6.65−2
- 7.73−71
- 8.631−530
- 9.244−24
- 10.174−1
- 11.934−421
- 12.789−541
Show the answer key
- 1.73
- 2.103
- 3.672
- 4.42
- 5.315
- 6.63
- 7.2
- 8.101
- 9.220
- 10.173
- 11.513
- 12.248
Answer key · Adding and taking away within 1000 · Level 3 · Sheet 1
- 1.73
- 2.103
- 3.672
- 4.42
- 5.315
- 6.63
- 7.2
- 8.101
- 9.220
- 10.173
- 11.513
- 12.248
The mistakes behind most wrong answers
A wrong answer in adding and taking away within 1000 is rarely random. These are the ones that come up most often, each on a real problem — worth knowing before you mark a sheet, because the fix for each is different.
- 356−303=?
The answer is 53. A child who answers 52 probably counted one too many or too few.
- 444−44=?
The answer is 400. A child who answers 44 probably answered with one of the numbers shown.
- 987−325=?
The answer is 662. A child who answers 1,312 probably added instead of taking away.
- 926+53=?
The answer is 979. A child who answers 873 probably took away instead of adding.
In the app, every wrong answer is matched against mistakes like these, and the weekly email tells you which one your child keeps making — in those words, not as a percentage.