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Earn +20 ptsQ: What is the common denominator of 30?
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What is the greatest common denominator of 30 and 42?
The greatest common denominator of any set of denominators is infinite.
What is the least common denominator of 18 and 30?
The LCD of 18 and 30 is 90
What is the greatest common factor of 60 and 330?
30 is the largest common denominator of 60 and 330.
What is the LCM of 3over5 and 1over6?
The least common denominator of 5 and 6 is 30.
Why does the fraction that results from adding or subtracting fractions with unlike denominators have a different denominator?
When you add fractions that have unlike denominators, the first step is to convert them so they are expressed as fractions using the least common denominator. The result is that the answer will have a different denominator, or it may use one of the original two denominators.For example if you are adding 1/10 and 3/5, the least common denominator is 10, the problem is rewritten as 1/10 + 6/10 = 7/10But if you are adding 1/5 and 1/6, the least common denominator is 30 and the problem is rewritten as 6/30 + 5/30 = 11/30
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