MATH SOLVE

10 months ago

Q:
# PLS HELP!!!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.the way she did it wasStep Work Reasoning−7.9 + 8.2 − 3.4 + 2.1 Original problem1 −7.9 + 8.2 + (−3.4) + 2.1 Additive inverse2 −7.9 + (−3.4) + 8.2 + 2.1 Associative property3 (−7.9 + (−3.4)) + (8.2 + 2.1) Commutative property4 −11.3 + 10.3 Simplify5 −1 Simplify

Accepted Solution

A:

I started with -7.9+8.2-3.4+2.1=-1.