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From: DOG To: Teacher2Teacher Public Discussion Date: 2004021715:33:20 Subject: you can ALWAYS divide across! When you get the two fractions to have common denominators, you can ALWAYS divide across. This process of finding common denominators is not as mysterious as the "waving of the wand" that we all learned (invert and multiply). You end up with the same solution, but the reason is more justifiable since you are still dividing, not using inverse operations.
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