## Thinking Mathematically (6th Edition)

RECALL: The associative property of multiplication states that for any real numbers $a, b,$ and $c$, $(a \cdot b) \cdot c = a \cdot (b \cdot c)$ $(6\cdot9)\cdot3=6\cdot(3\cdot9)$ Thus, the given expression illustrates the associative property of multiplication.