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August 17th, 2008, 12:15 PM  #1 
Newbie Joined: Aug 2008 Posts: 1 Thanks: 0  Forgotten math term
Hi all, What's it called when you swap numbers around in a sum to get an alternative such as: 1 + 1 = 2 and then you carry the one over: 1 = 2  1 I just can't remember the mathematical term/process for this! Thanks 
August 17th, 2008, 04:55 PM  #2 
Global Moderator Joined: Nov 2006 From: UTC 5 Posts: 16,046 Thanks: 938 Math Focus: Number theory, computational mathematics, combinatorics, FOM, symbolic logic, TCS, algorithms  Re: Forgotten math term
Changing a + b = c to a = c  b is called "subtraction". Other, less good, terms might include 'transposition' or 'canceling'. 
August 17th, 2008, 06:54 PM  #3  
Senior Member Joined: Jul 2008 Posts: 895 Thanks: 0  Re: Forgotten math term Quote:
 

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