Commutative and Associative Properties Practice

By using the Commutative Property and rearranging the expression to  $25\cdot4\cdot7$   you can multiply  $25\cdot4$   to get 100 and then multiply  $100\cdot7$  to get 700.  That is much easier than multiplying  $25\cdot7$  and then taking that answer and multipling it by 4.

 $12+8+13+7$   puts the 12+8 together which is a nice number and 13+7 which again is a nice number.

By grouping  $\left(5\cdot2\cdot10\right)$  you get 100. You can then easily multiply  $6\cdot100$ to get 600.

 $12+7+13+8$   can be rearranged using the Commutative Property to  $12+8+13+7$   but you can also use the Associative Property to group it like  $\left(12+8\right)+\left(13+7\right)$  .