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RE: Proposed changes in how 3-8 and Regents exams are scored
(message for Tzippy)
Posted:
Sep 14, 2011 9:16 PM
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I would go with 16. Operations in grouping symbols are first in order of operations but the parentheses here only show multiplication (no operation within). Division first from L to R.
k curtis
________________________________
From: owner-nyshsmath@mathforum.org [owner-nyshsmath@mathforum.org] on behalf of Gary Furman [gfurman@ecs.k12.ny.us]
Sent: Wednesday, September 14, 2011 5:20 PM
To: nysmhs@mathforum.org; nysmsmath@mathforum.org
Cc: nyshsmath@mathforum.org; nyscollmath@mathforum.org; nyselmath@mathforum.org; nysmmn@mathforum.org; nysmsmath@mathforum.org
Subject: Re: Proposed changes in how 3-8 and Regents exams are scored (message for Tzippy)
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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