Allen is showing his work in simplifying - 8.3 + 9.2 - 4.4 + 3.7. Identify and explain any errors in his work or in his reasoning. Write feedback to Allen explaining the mistake he made and how to correct his work.

Step Work Reasoning

-8.3 + 9.2 - 4.4 + 3.7 Original problem

1 - 8.3 + 9.2 + 4.4 + 3.7 Additive inverse

2 - 8.3 + 4.4 + 9.2 + 3.7 Commutative property

3 - 8.3 + (4.4 + 9.2 + 3.7) Associative property

4 - 8.3 + 17.3 Simplify

5 9 Simplify

Question

Ann Mcfarland

Mathematics

26 October, 20:20

Allen is showing his work in simplifying - 8.3 + 9.2 - 4.4 + 3.7. Identify and explain any errors in his work or in his reasoning. Write feedback to Allen explaining the mistake he made and how to correct his work.

Step Work Reasoning

-8.3 + 9.2 - 4.4 + 3.7 Original problem

1 - 8.3 + 9.2 + 4.4 + 3.7 Additive inverse

2 - 8.3 + 4.4 + 9.2 + 3.7 Commutative property

3 - 8.3 + (4.4 + 9.2 + 3.7) Associative property

4 - 8.3 + 17.3 Simplify

5 9 Simplify

+4

Answers (2)

Know the Answer?

Jane Browning · Answer 1

I can't comment so I'm putting my comment as my answer did you get this question right

Lena Kerr · Answer 2

-8.3 + 9.2 - 4.4 + 3.7 - - original problem

-8.3 - 4.4 + 9.2 + 3.7 - - commutative property

(-8.3 - 4.4) + (9.2 + 3.7) - - associative property

-12.7 + 12.9 - - simplify

0.2

not sure why the additive inverse was used because that messed the whole problem up ... should have kept 4.4 negative instead of turning it positive