anonymous
  • anonymous
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. 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
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
Keep doing each step manually, and see where it slips up: −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
anonymous
  • anonymous
So if you haven't noticed there are no errors
anonymous
  • anonymous
ok but what about for Write feedback to Arlene explaining the mistake she made and how to correct her work.

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anonymous
  • anonymous
anonymous
  • anonymous
Can you help?
anonymous
  • anonymous
Try answering the question and see where an error shows up, like @ChrystalC said :)
anonymous
  • anonymous
she said there are no errors @RainbowBrony555
anonymous
  • anonymous
@UnkleRhaukus can you help?
UnkleRhaukus
  • UnkleRhaukus
i don't see any errors
anonymous
  • anonymous
Theres no errors, @KAKES1967
anonymous
  • anonymous
ok so how would i go about this part though > Write feedback to Arlene explaining the mistake she made and how to correct her work. i would do nothing right?
anonymous
  • anonymous
I think so
OregonDuck
  • OregonDuck
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. 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 the properties in steps 2 & 3 are misidentified

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