Examples, solutions, videos, worksheets, and activities to help Algebra students learn how to add rational expressions.

A rational expression is a fraction in which the numerator and/or the denominator are variable expressions.

1. Factor all of the denominators.

2. Determine the least common denominator (LCD) from the factors.

3. Multiply the numerator and denominator of each fraction by any missing factors to form the LCD.

4. Add the fractions.

5. Simplify if possible.

How to add rational expressions that already have a common denominator, and how to simplify if it is possible to cancel?

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