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Re: Proposed changes in how 3-8 and Regents exams are scored
(message for Tzippy)
Posted:
Sep 14, 2011 6:56 PM
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In order of operations, multiplication and division are to be done left
to right regardless of the order. These parentheses are not grouping
symbols. There is no operation inside.
40 ÷ 5(2)
8(2)
16
>>> "Gary Furman" <gfurman@ecs.k12.ny.us> 9/14/2011 5:20 PM >>>
A teacher asked me about a problem in one of the math textbooks. Is
there some rule that I am not aware of in the order of operations for
multiplication and division from left to right?
Here is the problem:
40 ÷ 5(2)
Does the two in parentheses imply that the multiplication is to be done
first or is the problem done L to R with division first? One calculator
had 4 for the answer and another had 16.
Looking forward to your thoughts.
Gary Furman
Assistant Superintendent for Curriculum & Instruction
Ellenville Central School District
845-647-0107
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