Question

how do i know which one is commutative, associative, identity inverse or distributive property?
1.) 8+(9-7)=(8+9)-7
2.) (8/5)(5/8)=1
3.) 11(2x+y)=22x+11y

i think number 2 is inverse & 3 is distributive?

Answer 1

1 assos
2 inv
3 dist

rules you need to learn and understand

Answer 2

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