Which properties did Carmen use to solve the following problem?

Question

17 + (45 + 23)

17 + (23 + 45)

(17 + 23) + 45

40 + 45

85

not scam · Accepted Answer

i think not scam

Ms. Sue · Answer

http://www.mathsisfun.com/associative-commutative-distributive.html

im the world · Answer

no answers

kiiloo · Answer

associative property of addition

Rap-Geta · Answer

associative property of addition identity property of multiplication