Adding and Subtracting Fractions with like and 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 like denominators?

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Like denominators are when two or more fractions have the same denominator, making it easier to add or subtract them.

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What does it mean to have unlike denominators?

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Unlike denominators are when two or more fractions have different denominators, requiring a common denominator to add or subtract them.

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How do you add fractions with like denominators?

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How do you subtract fractions with like denominators?

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Front

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

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Find a common denominator for the fractions.

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How do you find a common denominator?

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The common denominator is usually the least common multiple (LCM) of the denominators.

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What is the process to add fractions with unlike denominators?

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Convert each fraction to an equivalent fraction with the common denominator, then add the numerators.

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What is the process to subtract fractions with unlike denominators?

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Convert each fraction to an equivalent fraction with the common denominator, then subtract the numerators.

Front

What is an example of adding fractions with unlike denominators?

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