Quote:
Originally Posted by eroticsexxx
Educational standards are improved, updated and modified continuously to eliminate ambiguities and this situation is one of them.
You quoted a standard that a math phd in 1999 said specifically that some texts at that time supported.
This is 2011 and present texts and science manuals support the implied mathematical standard. You googled an outdated standard that a phd supported over a decade ago.
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Just wondering what's your sample set to have convinced you that this is some kind of standard?
Here's another answer on a similar issue from Dr. Peterson
Quote:
Date: 05/02/2008 at 13:20:22
From: Doctor Peterson
Subject: Re: Multiplying parenthetical phrases and order of operations
Hi, Rob.
Your two expressions in the calculator are
36 / 6 ( 25 - 11 * 2 )
and
36 / 6 * ( 25 - 11 * 2 )
The problem is that some calculators that allow multiplications to
be implied as in the former case treat that as a higher precedence
operation (as some algebra texts say), while others treat all
multiplications alike (as most texts do, in my experience). You can
read a little about that here:
http://mathforum.org/library/drmath/view/72166.html
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So as late as 2008, the experience of a professor of mathematics was that while some texts treat implied multiplication as having a higher priority, "most texts" treat all multiplications alike.
This is further supported by my personal experience. We were taught about about implied multiplication, and in some cases it was specified to have priority, but we were never taught that it ws a standard.
Further evidence has been offered in the form of at least 3 Universities whose math departmens have posted their "Standard Order of Operations" online and make no mention of implicit outranking explicit.
Now perhaps you have more experience with Alegbra textbooks in the last few years? Maybe you're a publisher or a professor yourself? If so I'd like to hear what makes your experience so vast as to be able to pronounce that it's a standard when all evidence is to the contrary?