Web Analytics

Please Help!! Which property do these belong to; the commutative property, the distributive property, and the associative property?

A - 3x25=(3 x 30)+(3 x 5)= 75

B- 15 x (2 x 4) = (15 x 2) x 4 = 120

C - 30 + 5.2 + 7 = 7+5.2 + 3- = 42.2

D- 5 x 13 = (5 x 10) + (5 x 3) = 65