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Unit: Addition, subtraction, and estimation
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About this unit
Addition and subtraction are key skills for any math whiz. In this unit, you'll sharpen those skills by working with multi-digit numbers. You'll also learn how to round and estimate, so you can quickly make calculations even when you don't have a calculator handy.Learn
Practice
- Round whole numbersGet 5 of 7 questions to level up!
- Round whole numbers to different place valuesGet 3 of 4 questions to level up!
- Round whole numbers word problemsGet 3 of 4 questions to level up!
Up next for you:
Level up on all the skills in this unit and collect up to 500 Mastery points!