More sheets come with a subscription
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 within 100 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.
- 92+6=?
The answer is 98. A child who answers 86 probably took away instead of adding.
- 21+9=?
The answer is 30. A child who answers 29 probably counted one too many or too few.
- 18+10=?
The answer is 28. A child who answers 18 probably answered with one of the numbers shown.
- 49+2=?
The answer is 51. A child who answers 41 probably lost track of the ten.
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.