Solve this problem using either commutative or distributive property

Question

4*125(-39)*(-8)*25 by using either commutative or distributive property

Commutative is (a*b)*c=a*(b*c)

Distributive is a*(b+c)=a*b+a*c

Answer 1

4 * 5 * 5 * 5 * -39 * -8 * 5 * 5 =

2*2*5*5*5* -3 * 13 * -2 *2*2*5*5 =

-2*2*2*2*2 -3* 5*5*5*5*5* 13 <--- commutative property... BIG TIME!!!

-2 * 5 * 2*5*2*5*2*5*2*5 * -3 * 13 <--- another shots of commutative property

-10 * 10 * 10 * 10 *10 * -3 * 13

-100000 * -39

3900000