The Commutative property
the old switch-er-oo
switching numbers in an addition or multiplication problem
If you switch the order of numbers in an addition or multplication problem, it will not change the value of the awnser.
5 x 10 = 50 10 + 9 = 19
10 x 5 = 50 9 + 10 = 19
Commutative Property of Addition - MathHelp.com
Commutative Property of Multiplication - MathHelp.com