Adding and Subtracting Fractions and Mixed Numbers

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What is a fraction?

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What is a mixed number?

Back

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How do you add fractions with unlike denominators?

Back

To add fractions with unlike denominators, find the least common denominator (LCD), convert each fraction to an equivalent fraction with the LCD, and then add the numerators.

Front

What is the least common denominator (LCD)?

Back

The least common denominator is the smallest multiple that two or more denominators share.

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How do you subtract fractions?

Back

To subtract fractions, ensure they have the same denominator, then subtract the numerators and keep the denominator the same.

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Back

The first step is to find the least common denominator (LCD) of 8 and 3, which is 24.

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How do you convert a mixed number to an improper fraction?

Back

To convert a mixed number to an improper fraction, multiply the whole number by the denominator, add the numerator, and place that over the original denominator.

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Convert both mixed numbers to improper fractions, find the LCD, convert the fractions, and then add them.