Q&A #7499

Teachers' Lounge Discussion: Curious about fractions

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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.

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