Mathematics, 24.09.2020 01:01 joselinen
PLEASE HELP!!
Arlene is showing her work in simplifying โ7.9 + 8.2 โ 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.
StepWork Reasoning
โ7.9 + 8.2 โ 3.4 + 2.1 Original problem
1 โ7.9 + 8.2 + (โ3.4) + 2.1 Additive inverse
2 โ7.9 + (โ3.4) + 8.2 + 2.1 Associative property
3 (โ7.9 + (โ3.4)) + (8.2 + 2.1 Commutative property
4 โ11.3 + 10.3 Simplify
5 โ1 Simplify
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PLEASE HELP!!
Arlene is showing her work in simplifying โ7.9 + 8.2 โ 3.4 + 2.1. Identify any errors...
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