## Thinking Mathematically (6th Edition)

The associative property of addition states that for any real numbers $a, b,$ and $c$, $a +( b+c)= (a+b) +c$ In words, this means that the way we group things that we are adding does not impact the sum. Example: $3 +(4+5) = (3+4)+5$ Notice that both are equal to 12.
The associative property of addition states that for any real numbers $a, b,$ and $c$, $a +( b+c)= (a+b) +c$ Example: $3 +(4+5) = (3+4)+5$ Notice that both are equal to 12.