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.
Original problem: −7.9 + 8.2 − 3.4 + 2.1
Additive inverse: −7.9 + 8.2 + (−3.4) + 2.1
Associative property: −7.9 + (−3.4) + 8.2 + 2.1
Commutative property: (−7.9 + (−3.4)) + (8.2 + 2.1)
Simplify: −11.3 + 10.3
Simplify : −1

I will medal

Answer 1

and fan

Answer 2

well her answer is -1 and the correc one is also -1

Answer 3

Is anything wrong because its an essay question and I don't know what to write

Answer 4

I think she had done an error in properties but i don't khow where

Answer 5

I think so too

Answer 6

I asked another person to help ypu just a minute if she will answet

Answer 7

thanks

Answer 8

Graat she answered!

Answer 9

I told her to reply to you

Answer 10

ok

Answer 11

Don't know

Answer 12

Anyone

Answer 13

well she said she is trying to solve. I don't think that will work

Answer 14

here he is

Answer 15

Associative property: -7.9 + (-3.4) + 8.2 + 2.1
I think this property should be commutative.

Commutative property: (-7.9 + (-3.4)) + (8.2 + 2.1)
And this property should be associative.

I don't notice anything wrong

Answer 16

Am I wrong?

Answer 17

I am about to leave now. I am sorry for being helpless

Answer 18

thanks :) @tinybookworm