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Topic: Re: Proposed changes in how 3-8 and Regents exams are scored (message for
Tzippy)

Replies: 35   Last Post: Oct 24, 2011 9:59 PM

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 ezseller@mail.nasboces.org Posts: 43 Registered: 2/18/05
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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 att1.html (4.4 K)

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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