Re: PEMDAS Message #59 Posted by kimberly thompson on 26 July 2013, 10:42 a.m., in response to message #58 by fhub
Franz
I'm making NO claim about the evaluation of any advanced software other than a recognition of implicit multiplication; hence the reference to 'Googling'.
This url
http://community.wolframalpha.com/viewtopic.php?f=32&t=78280
contains
Here's a tip for people new to Maple or to 2D input: always use a space for implied multiplication. 2D math input in Maple allows for implicit multiplication, which is writing a multiplication operation without an explicit multiplication operator.
and this url
https://epsstore.ti.com/OA_HTML/csksxvm.jsp?nSetId=103994
the following
The TI89 family, TI92 family, and the Voyage 200 recognize implied multiplication...
I am in considerable agrreement with this url
http://community.wolframalpha.com/viewtopic.php?f=32&t=78280
and this text
Re: Evaluation of 6÷2(1+2)
by WolframAlphaTeam » Thu Feb 21, 2013 4:04 pm
Try avoiding ambiguous notation in queries. Instead of
6÷2(1+2)
use
(6÷2)*(1+2)
or
6÷(2*(1+2))
For either of these, there is no confusion as to what this means. To see how WA interprets the order of operations, see:
http://www.wolframalpha.com/input/?i=order+of+operations
In my years of number crunching for the military, NO ONE writes equations in this form '6 / 2(1+2)'. We use that funny little bar ___ in ALL expressions with a numerator/denominator.
I wanted to answer the question AS QUERIED and make NO claim beyond that. I will say, I have NEVER had a calculation submitted for final approval/inclusion rejected or altered for algebra errors.
I find the intensity of the conversation illuminating & appreciate the sincerity of the respective authors without umbrage!
SlideRule
