Mathematics, 17.09.2019 00:00 aedmund1225
Arlene is showing her work in simplifying β7.9 + 8.2 β 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 was
step work reasoning
β7.9 + 8.2 β 3.4 + 2.1 original problem
1 β7.9 + 8.2 + (β3.4) + 2.1 additive inverse
2 β7.9 + (β3.4) + 8.2 + 2.1 associative property
3 (β7.9 + (β3.4)) + (8.2 + 2.1) commutative property
4 β11.3 + 10.3 simplify
5 β1 simplify
Answers: 2
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Arlene is showing her work in simplifying β7.9 + 8.2 β 3.4 + 2.1. identify any errors in her work or...
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