Add and Subtract within 1000 - Step-by-Step Lesson

This Add and Subtract within 1000 - Step-by-Step Lesson worksheet also includes:

Three-digit numbers are the name of the game here! Scholars convert 456 to expanded form, then complete one addition and one subtraction problem. The equations are written vertically, and the addends produce a four-digit number. There is no borrowing or carrying involved. Because an explanation is detailed right below these, consider using it as an all-class warm up. Cover up the answers until all learners have gotten a chance to solve it for themselves. 

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CCSS: Adaptable
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2nd - 4th
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Common Core