Adding and Subtracting Fractions with 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). For example, in the fraction 1/2, 1 is the numerator and 2 is the denominator.

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What does it mean to have unlike denominators?

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Unlike denominators are denominators that are not the same. For example, in the fractions 1/4 and 1/3, the denominators 4 and 3 are unlike.

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How do you find a common denominator for two fractions?

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To find a common denominator, you can multiply the denominators together or find the least common multiple (LCM) of the denominators.

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What is the least common multiple (LCM)?

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The least common multiple (LCM) of two or more numbers is the smallest number that is a multiple of each of the numbers.

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How do you add fractions with unlike denominators?

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To add fractions with unlike denominators, first find a common denominator, convert each fraction to an equivalent fraction with that denominator, and then add the numerators.

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

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The first step is to find a common denominator for the fractions.

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If you have the fractions 1/5 and 5/6, what is a common denominator?

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A common denominator for 1/5 and 5/6 is 30.

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How do you simplify a fraction?

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To simplify a fraction, divide the numerator and the denominator by their greatest common factor (GCF).

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What is the greatest common factor (GCF)?

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The greatest common factor (GCF) is the largest number that divides two or more numbers without leaving a remainder.

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