LCD/Add and Subtract Fractions with unlike Denominators

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What is the least common denominator (LCD)?

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The least common denominator (LCD) is the smallest multiple that two or more denominators share. It is used to add or subtract fractions with unlike denominators.

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How do you find the LCD of 4 and 2?

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The least common denominator of 4 and 2 is 4, as it is the smallest number that both denominators can divide into without a remainder.

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

Back

The first step is to find the least common denominator (LCD) of the fractions.

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What do you need to add or subtract fractions?

Back

You need common denominators to add or subtract fractions.

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

Back

Divide the numerator by the denominator. The quotient is the whole number, and the remainder is the new numerator over the original denominator.

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What is the process to add fractions with different denominators?

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1. Find the least common denominator (LCD). 2. Convert each fraction to an equivalent fraction with the LCD. 3. Add the numerators and keep the common denominator.