Simplify the expression and justify each step. (33+45)+7
asked Aug 10, 2017 in Word Problem Answers by anonymous

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Although the expression can be evaluated by simply adding the three numbers, the contents of the parentheses should be evaluated first: 33+45=78, then the parentheses and their contents can be replaced by this result so we have 78+7=85.

answered Aug 11, 2017 by Rod Top Rated User (552,780 points)

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