The Math Forum

Ask Dr. Math - Questions and Answers from our Archives
Associated Topics || Dr. Math Home || Search Dr. Math

A + B = B + A ?

Date: 7/24/96 at 13:37:22
From: Anonymous
Subject: A + B =? B + A

Is A + B = B + A true or not true?

Date: 7/24/96 at 13:46:50
From: Doctor Robert
Subject: Re: Is A + B = B + A true or not true?

It depends on what A and B are.  However, if A and B are real numbers, 
then the statement is assumed to be true.  It is called the 
commutative axiom of addition.  

-Doctor Robert,  The Math Forum
 Check out our web site!   
Associated Topics:
Elementary Addition

Search the Dr. Math Library:

Find items containing (put spaces between keywords):
Click only once for faster results:

[ Choose "whole words" when searching for a word like age.]

all keywords, in any order at least one, that exact phrase
parts of words whole words

Submit your own question to Dr. Math

[Privacy Policy] [Terms of Use]

Math Forum Home || Math Library || Quick Reference || Math Forum Search

Ask Dr. MathTM
© 1994- The Math Forum at NCTM. All rights reserved.