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The mistakes behind most wrong answers
A wrong answer in what the leftover means 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 is packing 93 cards into boxes. Each box holds 9. How many cards are left over?
The answer is 3. A child who answers 4 probably counted one group too many or too few.
Zara is packing 48 shells into boxes. Each box holds 5. How many boxes are needed to fit them all?
The answer is 10. A child who answers 3 probably gave the leftover instead of how many groups.
Zara is packing 103 pencils into boxes. Each box holds 4. How many pencils are left over?
The answer is 3. A child who answers 26 probably counted a part-filled group as a full one.
Owen is packing 114 stickers into boxes. Each box holds 7. How many boxes are needed to fit them all?
The answer is 17. A child who answers 16 probably forgot the leftover still needed somewhere to go.
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.