Ten more, ten less worksheets
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Only the tens digit changes: ten more is one ten up, ten less is one ten down.
Just 1st grade. Print it here, or open the page for examples and teaching notes.
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1st grade Core grade
Each print is a different sheet with its own answer key. You don't need to sign up.
Ten more, ten less worksheets give first graders prompts like "10 more than 47 is __" to answer mentally. The skill is doing it without counting: seeing that only the tens digit moves.
More on place value & rounding
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