Main content

# Addition, subtraction, and estimation

Learn

Practice

Round to nearest 10 or 100 on the number lineGet 5 of 7 questions to level up!

Round to nearest 10 or 100Get 3 of 4 questions to level up!

Round to nearest 10 or 100 challengeGet 3 of 4 questions to level up!

Practice

Estimate to add multi-digit whole numbersGet 3 of 4 questions to level up!

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

Select strategies for adding within 1000Get 3 of 4 questions to level up!

Practice

Estimate to subtract multi-digit whole numbersGet 3 of 4 questions to level up!

Learn

Practice

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

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

Select strategies for subtracting within 1000Get 3 of 4 questions to level up!

Learn

Practice

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

Learn

Practice

Add and subtract within 1000 word problemsGet 3 of 4 questions to level up!