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