Elementary Math
posted by carrie .
A student asks about the relation between least common multiple and least common denominator. How do yourespond?

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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