Adding and Subtracting mixed numbers with unlike denominators

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What is a mixed number?

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How do you add mixed numbers with unlike denominators?

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1. Convert mixed numbers to improper fractions. 2. Find a common denominator. 3. Add the fractions. 4. Convert back to a mixed number if necessary.

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What is an improper fraction?

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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 subtract mixed numbers with unlike denominators?

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1. Convert mixed numbers to improper fractions. 2. Find a common denominator. 3. Subtract the fractions. 4. Convert back to a mixed number if necessary.

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The least common multiple (LCM) of 10 and 8 is 40, so the common denominator is 40.

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