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# Addition and subtraction within 1000

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Skip-counting by 100s

Practice

Skip-counting by 100sGet 5 of 7 questions to level up!

Learn

Adding 10 or 100Adding 1s, 10s, and 100sAdding 3-digit numbers (no regrouping)

Practice

Add 10s and 100s (no regrouping)Get 5 of 7 questions to level up!

Add 2- and 3-digit numbers (no regrouping)Get 5 of 7 questions to level up!

Learn

Subtracting 1, 10, or 100Subtracting 1s, 10s, and 100sSubtracting 3-digit numbers (no regrouping)

Practice

Subtract 10s and 100s (no regrouping)Get 5 of 7 questions to level up!

Subtract 2- and 3-digit numbers (no regrouping)Get 5 of 7 questions to level up!

Learn

Breaking apart 3-digit addition problemsSolving 3-digit addition in your headAddition using groups of 10 and 100Adding and subtracting on number line

Practice

Break apart 3-digit addition problemsGet 3 of 4 questions to level up!

Add using groups of 10 and 100Get 3 of 4 questions to level up!

Add on a number lineGet 3 of 4 questions to level up!