Question

Morris is showing his work in simplifying (-6.7 + 4.3) - 1.2. Step 1. (4.3 - 6.7) - 1.2 Step 2: 4.3 - (6.7 + 1.2) Step 3: 4.3 - (7.9) step 4: -3.6, Which statement is true? a. In step 1, Morris used the commutative property. b. In step 2, Morris used the distributive property. C. In step 3, Morris used the associative property. D. In step 4, Morris's answer is incorrect

Answer 1

The answer would be A

Explanation:

So, we can rule out B as he didn't use distributive property in step 2, we can also rule out C as he indeed did not use associative property in step number 3, and finally we know D is wrong as his work and answer are correct, so were left with A, and A is correct as he used commutative property in his first step. :D hope that helped!

Answer 2

(-6.7 + 4.3) - 1.2
(4.3 - 6.7) - 1.2...step 1
4.3 - (6.7 + 1.2) ..step 2
4.3 - (7.9)...step 3
-3.6...step 4

I know it is not 4, because his answer is correct. And on step 2, he didn't distribute. This is a little confusing to me because I thought there had to be an equal sign in there to do the properties....my guess would be :
Morris uses the commutative property in step 1.