Free printable worksheets with answer keys. Pick a level, preview the questions, then open the sheet to swap or delete any single question.
Easy: Two-digit numbers to the nearest 10
An estimate is a quick, close answer. Round each number to the place you are told, then do the easier calculation with the round numbers. Estimating is a good way to check whether an exact answer makes sense.
Estimate: round each number to the place shown, then add or subtract.
Tip: tick “Step-by-step answer key” in the generator to print each step for marking.
Estimating gives a quick sense of the answer's size, which is useful when an exact answer isn't needed and for checking whether an exact answer is reasonable.
Round each number first, then add or subtract the rounded numbers. Rounding after adding gives a rounded exact answer, which is a different thing.
Yes. Numbers are generated each time, and the answer key is calculated for that sheet. Swap any single question and its answer updates too.
Yes. In the generator, add more skills; each gets its own section on the sheet with its own instructions.
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