Thursday, October 1, 2009

Addition

There are numbers EVERYWHERE! We are constantly doing math, even when we don't realize it. Yesterday we learned about the different properties of addition and multiplication.

Properties of Addition
1. closure: any number in the set added with a different number in the set, remains a number located in the set
2. identity
3. commutative: order of the numbers does not matter
ex. 3+4+5 or 5+3+4
4. associative: regrouping numbers
ex. (2+3x)+5x or 2+(3x+5x)

Click Here to see the associative and commutative properties demonstrated in the classroom.

1 comment:

  1. I also agree that math is everywhere in our daily lives. As much as we don't think about it, we use math almost all day every day. Going grocery shopping and figuring out how much things will cost, to match up to how much money you will spend. Or how much time you have to waste before work. EVERYTHING!

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