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Addition and Subtraction of Rational Expressions

Addition and Subtraction of Rational Expressions

Author: Kelsey Hennen
Description:

Learn how to add and subtract rational expressions as well as how to find the Least Common Denominator.

This packet includes definitions of rational expressions and least common denominators, a video to review finding the least common denominator, steps for how to add and subtract rational expressions, and step-by-step examples.

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Tutorial

Key Terms for this Packet

Least Common Denominator Practice with Digits and Polynomials

Watch this video to help you learn how to find the Least Common Denominator and how to change the denominator of a fraction.

Steps for Adding and Subtracting Rational Expressions

1. Find the Least Common Denominator between all of the fractions.
 
2. Change the denominators of each fraction to be the least common denominator.
 
3. Write the fractions as one fraction- adding and subtracting each term as appropriate.
 
4. Distribute the minus signs if subtracting.
 
5. Combine like-terms.

Step-by-step examples of how to add and subtract rational expressions

Practice Problems

Try your best to do these on your own and then check your answers!