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The first sheet at every level is free. A subscription gives you a new sheet whenever you want one — and the part paper cannot do: five minutes of practice a day that adapts to your child, and a weekly email naming exactly what they are stuck on.
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The mistakes behind most wrong answers
A wrong answer in adding and taking away fractions 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.
- 812+1012=?
The answer is 1812. A child who answers 1824 probably changed the bottom number too.
- 16+36=?
The answer is 46. A child who answers 56 probably counted one too many or too few.
- 412+112=?
The answer is 512. A child who answers 312 probably took away instead of adding.
- 34−24=?
The answer is 14. A child who answers 54 probably added instead of taking away.
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.