Adding/Subtracting Fractions w/ Common Denominators

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What is a common denominator?

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A common denominator is a shared multiple of the denominators of two or more fractions, allowing them to be added or subtracted.

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How do you add fractions with common denominators?

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To add fractions with common denominators, keep the denominator the same and add the numerators.

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How do you subtract fractions with common denominators?

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To subtract fractions with common denominators, keep the denominator the same and subtract the numerators.

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What does it mean to simplify a fraction?

Back

To simplify a fraction means to reduce it to its lowest terms by dividing the numerator and denominator by their greatest common factor.

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What is the first step in adding or subtracting fractions?

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The first step is to ensure that the fractions have a common denominator.