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?

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Unlike denominators are denominators that are not the same. For example, in the fractions 1/4 and 1/3, 4 and 3 are unlike denominators.

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How do you find the least common denominator (LCD) of two fractions?

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To find the LCD, list the multiples of each denominator and find the smallest multiple that both denominators share.

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What is the least common denominator of 1/7 and 3/6?

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The least common denominator of 1/7 and 3/6 is 42.

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How do you add fractions with unlike denominators?

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To add fractions with unlike denominators, first find the least common denominator, convert each fraction to an equivalent fraction with the LCD, and then add the numerators.

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What is the process to subtract fractions with unlike denominators?

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To subtract fractions with unlike denominators, find the least common denominator, convert each fraction to an equivalent fraction with the LCD, and then subtract the numerators.

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How do you simplify a fraction?

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To simplify a fraction, divide the numerator and the denominator by their greatest common factor (GCF).

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