Q&A #7499

Teachers' Lounge Discussion: Curious about fractions

T2T || FAQ || Ask T2T || Teachers' Lounge || Browse || Search || T2T Associates || About T2T

View entire discussion
[<< prev] [ next >>]

From: roger

To: Teacher2Teacher Public Discussion
Date: 2006071020:28:13
Subject: 3 ARROW

YOU ARE REFERRING TO THE DEFINITION FOR ADDITION OF FRACTIONS. a/b + c/d = (ad + bc)/bd. It is also true for subtraction a/b - c/d = (ad - bc)/bd. It is best used when the denominators are mutually prime, that is when the only common factor is he number 1.

Post a reply to this message
Post a related public discussion message
Ask Teacher2Teacher a new question

[Privacy Policy] [Terms of Use]

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

Teacher2Teacher - T2T ®
© 1994- The Math Forum at NCTM. All rights reserved.