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Unit: Addition, subtraction, and estimation
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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!
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Level up on all the skills in this unit and collect up to 1600 Mastery points!