Mathematics
Mathematics, 22.04.2020 18:26, kataldaine

Andrew is showing his work in simplifying βˆ’4.5 + 4.2 + 5.6 βˆ’ 7.3. Identify any errors in his work or in his reasoning. Write feedback to Andrew explaining the mistake he made and how to correct his work. (5 points)

Step Work Reasoning
βˆ’4.5 + 4.2 + 5.6 βˆ’ 7.3 Original problem
1 βˆ’4.5 + 4.2 + 5.6 + (βˆ’7.3) Additive inverse
2 βˆ’4.5 + (βˆ’7.3) + 4.2 + 5.6 Commutative property
3 (βˆ’4.5 + (βˆ’7.3)) + (4.2 + 5.6) Associative property
4 βˆ’11.8 + 9.8 Simplify
5 βˆ’21.6 Simplify

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Andrew is showing his work in simplifying βˆ’4.5 + 4.2 + 5.6 βˆ’ 7.3. Identify any errors in his work or...

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