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The mistakes behind most wrong answers
A wrong answer in two-step problems with all four operations 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.
Kai shares 88 cards equally onto 8 plates, then eats 6 from one plate. How many are left on it?
The answer is 5. A child who answers 11 probably answered the first half and stopped.
Mia shares 48 cards equally onto 3 plates, then adds 1 more to one plate. How many are on that plate now?
The answer is 17. A child who answers 145 probably multiplied instead of dividing.
Noah shares 70 blocks equally onto 10 plates, then adds 4 more to one plate. How many are on that plate now?
The answer is 11. A child who answers 3 probably took away instead of adding.
Lucas shares 12 pencils equally onto 4 plates, then eats 1 from one plate. How many are left on it?
The answer is 2. A child who answers 4 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.