Friday

September 19, 2014

September 19, 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.

**Answer this Question**

**Related Questions**

Math - okay so i feel like a dummie for not knowing this but i need the answer ...

math - Write an algebraic expression that requires each of the following ...

Algebra - 55. Find the range of y = 2x + 1. a. all real numbers b. all positive ...

Algebra - 55. Find the range of y = 2x + 1. a. all real numbers b. all positive ...

Algebra - 55. Find the range of y = 2x + 1. a. all real numbers b. all positive ...

Algebra - 55. Find the range of y = 2x + 1. a. all real numbers b. all positive ...

Pre-Algebra: HELP PLEASE - I'm really bad at these, can someone help me PLEASE? ...

math - if you simplify the expression 3x+4(x-2)-3x into the expression 3x+ 4x -8...

Algebra 1 - Which property does the equation 4 + x +7 = 4 + 7 + x illustrate? A...

algebra - Which property would allow you to use mental computation to simplify ...