Posted by carrie on Monday, August 17, 2009 at 6:51pm.
When you're adding or subtracting fractions, you need to find the least common denominator.
For instance:
1/2 + 3/4 + 5/8 = 4/8 + 6/8 + 5/8 = 15/8
The least common denominator is also the least common multiple. In the above problem that is 8.
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