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kristakingmath.com
Adding and subtracting fractions by finding a common denominator — Krista King Math | Online math help
When the denominators are unequal, we have to find a common denominator before we can add or subtract the fractions. To find a common denominator, we need to find the least common multiple (LCM) of the denominators. Then we can use the LCM as our common denominator. In fact, we call that the “least
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