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 rounding to tens and hundreds 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.
Round 750 to the nearest hundred.
750The answer is 800. A child who answers 900 probably counted one group too many or too few.
Round 945 to the nearest ten.
945The answer is 950. A child who answers 900 probably rounded to the wrong place.
Round 205 to the nearest ten.
205The answer is 210. A child who answers 200 probably chopped the digits instead of rounding.
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.