Matt is showing his work in simplifying (6.2 − 1.6) − 4.4 + 7.8. Identify any error in his work or reasoning.

Step 1: (6.2 − 1.6) − 4.4 + 7.8
Step 2: 6.2 + (− 1.6 − 4.4) + 7.8 (commutative property)
Step 3: 6.2 − 6 + 7.8
Step 4: −14 − 6 = 8 (commutative property)
Step 5: 14 − 6 = 8

He wrote commutative instead of distributive in Step 4.

He wrote commutative instead of distributive in Step 2.

He wrote commutative instead of associative in Step 4.

He wrote commutative instead of associative in Step 2.

Question

Matt is showing his work in simplifying (6.2 − 1.6) − 4.4 + 7.8. Identify any error in his work or reasoning. 

Step 1: (6.2 − 1.6) − 4.4 + 7.8
Step 2: 6.2 + (− 1.6 − 4.4) + 7.8 (commutative property)
Step 3: 6.2 − 6 + 7.8
Step 4: −14 − 6 = 8 (commutative property)
Step 5: 14 − 6 = 8

 He wrote commutative instead of distributive in Step 4.

 He wrote commutative instead of distributive in Step 2.

 He wrote commutative instead of associative in Step 4.

 He wrote commutative instead of associative in Step 2.

helpmath1 · Answer

Please help I have a cold and I cant focus

jhonyy9 · Answer

how you think what need being the first step always when there are parentheses ?

helpmath1 · Answer

WhaT?

jhonyy9 · Answer

please collaborate i like help you ?

jhonyy9 · Answer

(6.2 − 1.6) − 4.4 + 7.8.

step one when an equation contain parentheses always necessary distribute the parentheses - yes ?