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Subtracting 1 vs. subtracting 10 | Addition and subtraction within 100 | 2nd grade | Khan Academy
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Sal talks about the difference between subtracting 1 and subtracting 10.
2nd grade on Khan Academy: Learn to see three-digit numbers as hundreds, tens, and ones
For free. For everyone. Forever. #YouCanLearnAnything
2nd grade on Khan Academy: Learn to see three-digit numbers as hundreds, tens, and ones
For free. For everyone. Forever. #YouCanLearnAnything