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Strategies for adding 2- and 3-digit numbers
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Solving 3-digit addition in your head
Breaking apart 3-digit addition problems
Adding and subtracting on number line
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Strategies for adding within 1000
Add using groups of 10 and 100
Select strategies for adding within 1000
Break apart 3-digit addition problems
Add using groups of 10 and 100
Add on a number line
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