Add and Subtract Unlike Fractions

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What is an unlike fraction?

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Unlike fractions are fractions that have different denominators.

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How do you add unlike fractions?

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To add unlike fractions, first find a common denominator, convert each fraction, and then add the numerators.

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What is the least common denominator (LCD)?

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The least common denominator is the smallest multiple that two or more denominators share.

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Find the least common denominator for 1/3 and 3/4.

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The least common denominator for 1/3 and 3/4 is 12.

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Find the least common denominator for 6/7 and 1/2.

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The least common denominator for 6/7 and 1/2 is 14.

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Front

What is the first step in adding unlike fractions?

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The first step is to find the least common denominator.

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What do you do after finding the common denominator?

Back

Convert each fraction to an equivalent fraction with the common denominator.

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