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Thursday, March 9, 2017

Composing and Decomposing Numbers

What does it mean to compose and decompose numbers?   If you compose a number you out it together.  If you decompose a number you break it apart. Our  math standards state we can compose and decompose numbers 11-19.  Students must see one of these numbers as 10 and some more.  For example, the number 14 is 10 and 4 more. We would write that number sentence as 10+4=14. 







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