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# Addition and subtraction

### Learn

### 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 and subtract on a number lineGet 3 of 4 questions to level up!

Estimate to add and subtract multi-digit whole numbersGet 5 of 7 questions to level up!

### Learn

### Practice

Subtract within 1000Get 3 of 4 questions to level up!

### Practice

Find the missing number (add and subtract within 1000)Get 3 of 4 questions to level up!