Add and Subtract Fractions with Unlike Denominators

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What is a fraction?

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A fraction represents a part of a whole and consists of a numerator (top number) and a denominator (bottom number).

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What does the denominator of a fraction represent?

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The denominator indicates how many equal parts the whole is divided into.

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What does the numerator of a fraction represent?

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The numerator shows how many parts of the whole are being considered.

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How do you add fractions with unlike denominators?

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To add fractions with unlike denominators, first find a common denominator, convert the fractions, 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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What is the first step in subtracting fractions with unlike denominators?

Back

The first step is to find a common denominator for the fractions.

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What do you do with the numerators when adding fractions?

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You add the numerators together after converting to a common denominator.

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