Properties:

Associative Property: An operation is associative if you can group numbers in any way without changing the answer. It does not

matter how you combine them, the answer will always be the same. Addition and multiplication are both associative.

Examples for addition:

1+(2+3)=(1+2)+3

1+(5)=(3)+3 or 1+5=3+3

6=6

more generally:

(a+b)+c=a+(b+c)

or

(a*b)*c=a*(b*c)