Adding and Subtracting 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 it mean to have unlike denominators in fractions?

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Unlike denominators are when the denominators of two or more fractions are different, making it necessary to find a common denominator to add or subtract them.

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How do you find a common denominator for two fractions?

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To find a common denominator, identify the least common multiple (LCM) of the denominators.

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What is the first step in adding fractions with unlike denominators?

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

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How do you add fractions once you have a common denominator?

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Once you have a common denominator, add the numerators together and keep the common denominator.

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What is the formula for subtracting fractions with unlike denominators?

Back

To subtract fractions, find a common denominator, then subtract the numerators while keeping the common denominator.

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