Adding and Subtracting Fractions with Unlike Denominators

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What is a fraction?

Back

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 bottom numbers of two or more fractions are different, making it necessary to find a common denominator to add or subtract them.

Front

How do you find a common denominator for two fractions?

Back

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

Front

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

Back

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

Front

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

Back

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

Front

What is the formula for adding two fractions?

Back

Front

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

Back

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

Front

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

Back

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

Front

What is the formula for subtracting two fractions?

Back

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