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. (5 points)

Step Work Reasoning
−7.9 + 8.2 − 3.4 + 2.1 Original problem
1 −7.9 + 8.2 + (−3.4) + 2.1 Additive inverse
2 −7.9 + (−3.4) + 8.2 + 2.1 Associative property
3 (−7.9 + (−3.4)) + (8.2 + 2.1) Commutative property
4 −11.3 + 10.3 Simplify
5 −1 Simplify


Help me plz!

Answer 1

if it helps the screenshot is below

Answer 2

they miss a step

Answer 3

I have to write feedback to Arlene explaining the mistake she made and how to correct her work also

Answer 4

oooh

Answer 5

she simlafiied wrong

Answer 6

it should be -1.6

Answer 7

Thanks for the help

Answer 8

because -11.3 + 10.3 = -1.6 simlified is -2.0

Answer 9

np