# Addition and subtraction within 100

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### Practice

Add 1 or 10Get 5 of 7 questions to level up!

Add 1s or 10s (no regrouping)Get 5 of 7 questions to level up!

### Learn

### Practice

Subtract 1 or 10Get 5 of 7 questions to level up!

Subtracting 1s or 10s (no regrouping)Get 5 of 7 questions to level up!

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### Practice

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

Break apart 2-digit addition problemsGet 3 of 4 questions to level up!

Regroup when adding 1-digit numbersGet 5 of 7 questions to level up!

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### Practice

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

Subtract 1-digit numbers with regroupingGet 5 of 7 questions to level up!

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### Practice

Add 2-digit numbers by making tensGet 3 of 4 questions to level up!

Add 2-digit numbers by making tens 2Get 3 of 4 questions to level up!

Select strategies for adding within 100Get 5 of 7 questions to level up!

Add and subtract using a number lineGet 3 of 4 questions to level up!

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### Practice

Add within 100Get 5 of 7 questions to level up!

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### Practice

Subtract within 100Get 5 of 7 questions to level up!

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Add and subtract on the number line word problemsGet 5 of 7 questions to level up!

Add and subtract within 100 word problems 1Get 5 of 7 questions to level up!

Add and subtract within 100 word problems 2Get 5 of 7 questions to level up!

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### Practice

Add and subtract within 100 word problems 3Get 5 of 7 questions to level up!

Challenging add and subtract word problems (within 100)Get 5 of 7 questions to level up!

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### Practice

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

Skip-count by 10sGet 5 of 7 questions to level up!

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

### Practice

Find the missing number (add and subtract within 100)Get 3 of 4 questions to level up!