Adding Fractions (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 add fractions with unlike denominators?

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It means to find a common denominator before adding the fractions together.

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How do you find a common denominator for two fractions?

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You can find the least common multiple (LCM) of the two denominators.

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What is the least common multiple (LCM) of 2 and 5?

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The LCM of 2 and 5 is 10.

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Find a common denominator for 7 and 5.

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What is the LCM of 7 and 5?

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The LCM of 7 and 5 is 35.

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