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Unit 2: Addition and subtraction

800 possible mastery points

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.
Level up on the above skills and collect up to 480 Mastery points
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Unit test

Level up on all the skills in this unit and collect up to 800 Mastery points!