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Unit: Addition and subtraction

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Equal signGet 5 of 7 questions to level up!
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Find missing number (add and subtract within 20)Get 5 of 7 questions to level up!
Level up on the above skills and collect up to 200 Mastery points
Level up on the above skills and collect up to 400 Mastery points
Level up on the above skills and collect up to 500 Mastery points
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About this unit

First, we will learn how addition and subtraction relate. Next, we will add and subtract numbers less than or equal to 20 and solve addition and subtraction word problems. Finally, we will begin adding 2-digit numbers.