Question

1. 3+2+1=1+2+3
2. 3(1+4)=(3x1)+(3X4)
3. 9(5+6)=45+54
4. 9+(4+3)=(4+3)+9
5. (9+7)+6=9+(7+6)
6. 5(a+7)=5a+35

A. Associative Prop. of Addition
B. Associative Prop. of Multiplication
C. Commutative Prop. of Addition
D. Commutative Prop. of Multiplication
E. Distributive Prop.

1.C
2.B
3.E
4.A
5.A
6.E

Answer 1

1,3,4,5,6 are correct.
Rethink 2, you'll get it right.

Answer 2

Would it be E?