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Tuesday, November 12, 2013

More Composing and Decomposing

As I stated last in my last composing and decomposing post. -----
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. 

This week we are using teen numbers and breaking the into 2 tens frames, place value, a number sentence, and words.  

This is reinforced in math stations 😊

This is such a hard skill to learn but once the students have it, they seem not to struggle as much with number sense.

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