Question

Arlene is showing her work in simplifying −7.9 + 8.2 − 3.4 + 2.1. Identify any errors in her work or in her reasoning. Write feedback to Arlene explaining the mistake she made and how to correct her work.

Answer 1

first
There are no errors
Keep doing each step manually until something sounds off
−7.9+8.2−3.4+2.1=−1
−7.9+8.2+(−3.4)+2.1=−1
−7.9+(−3.4)+8.2+2.1=−1
(−7.9+(−3.4))+(8.2+2.1)=−1
−11.3+10.3=−1

Answer 2

It's all question marks except for some of the numbers.

Answer 3

Yep, there are no errors in her work

Answer 4

Oh okay. Thanks!

Answer 5

Your welcome, and if you see the question marks, just refresh :)

Answer 6

Oh okay . :)

Answer 7

Oh! Now I see it :D Thanks again! LOL