Question

1. 5/3+(-1/5)
a. -22/5
b. -22/15
c. 22/15**
d. 28/15
2. Which property is illustrated by the statement?
(3+2.8)+5=3+(2.8+5)

a. Commutative Property of Addition
b. Commutative Property of Multiplication
c. Inverse Property of Multiplication
d. Associative Property of Addition **

Answer 1

1. No.

2. Why isn't a correct?

http://www.mathsisfun.com/associative-commutative-distributive.html

Answer 2

Is it b for number 1?

Answer 3

I'm sorry -- but you were right the first time. I should know better than try to do a math problem in my head.

5/3+(-1/5)

25/15 - 3/15 = 22/15