Shown below is a problem Margaret solved and the steps she used to solve it. Margaret has entered this problem incorrectly. What
misunderstandings does Margaret have? Show your work.
1/2 (64 + 5) - 0.2 (-20 +10)
1/2 (69) - 6
34.5 - 6
28.5
(paper due on 11/5/18
1 answer:
She has distributed the bracket incorrectly
(64 + 5) - 0.2(- 20 + 10)
=
(69) - 0.2 (- 10)
=34.5 + 2
= 36.5
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