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June 18th, 2016, 04:52 AM  #1 
Newbie Joined: Jun 2016 From: Maine Posts: 9 Thanks: 1 Math Focus: Enjoyed algebra for its utility  Simple Arithmetic that makes me bang my head
So I'm trying to study math again and looking at an algebra cheat sheet. How does this make sense? (ab) / (cd) = (ba) / (dc) HELP! 
June 18th, 2016, 04:55 AM  #2 
Math Team Joined: Jul 2011 From: Texas Posts: 2,771 Thanks: 1426 
$\dfrac{ab}{cd} = \dfrac{1(ab)}{1(cd)}= \dfrac{ba}{dc}$

June 18th, 2016, 05:00 AM  #3 
Newbie Joined: Jun 2016 From: Maine Posts: 9 Thanks: 1 Math Focus: Enjoyed algebra for its utility  
June 18th, 2016, 05:04 AM  #4 
Math Team Joined: Jul 2011 From: Texas Posts: 2,771 Thanks: 1426  
June 19th, 2016, 05:49 AM  #5 
Senior Member Joined: May 2016 From: USA Posts: 1,150 Thanks: 479  If you want to start learning LaTeX, a good way is to reply with quote to a post using LaTeX. You will then see the actual code in the reply box. Also very helpful is https://en.m.wikipedia.org/wiki/Wikipedia:LaTeX_symbols Last edited by JeffM1; June 19th, 2016 at 05:56 AM. 

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