Homework Help: math

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

Which property would allow you to use mental computation to simplify the problem 27 + 15 + 3 + 5?

1) commutative property of addition
2) distributive property
3) additive identity
4) additive inverse

math - Reiny, Monday, October 1, 2012 at 7:59pm
mentally I would do it as
27+3 + 15+5
or
30+20

You decide which properties I used.

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