Adding 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 in 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 in a fraction represent?

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

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What is an unlike denominator?

Back

Unlike denominators are denominators that are different from each other.

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What is a common denominator?

Back

A common denominator is a number that is a multiple of the denominators of two or more fractions.

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How do you find a common denominator for 1/3 and 1/5?

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The least common multiple (LCM) of 3 and 5 is 15, so the common denominator is 15.

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What is the first step to add fractions with unlike denominators?

Back

Find a common denominator for the fractions.

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What is the equation for adding fractions?

Back

To add fractions, convert them to have a common denominator, then add the numerators and keep the common denominator.

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