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April 20, 2014

April 20, 2014

Posted by **amber** on Monday, October 1, 2012 at 7:44pm.

1) commutative property of addition

2) distributive property

3) additive identity

4) additive inverse

- math -
**Reiny**, Monday, October 1, 2012 at 7:59pmmentally I would do it as

27+3 + 15+5

or

30+20

You decide which properties I used.

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