# Addition and subtraction

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Break apart 3-digit addition problems

4 questions

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Add using groups of 10 and 100

4 questions

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Add and subtract on a number line

4 questions

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Estimate to add and subtract multi-digit whole numbers

7 questions

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Subtract within 1000

4 questions

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**Addition and subtraction**with these 10 questions.About this unit

Learn how to add and subtract three-digit numbers by thinking about ones, tens, and hundreds.