Adding and Subtracting Rational Expressions
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Common Core For Algebra
Adding and Subtracting Rational Expressions
Student Outcomes
- Students perform addition and subtraction of rational expressions.
New York State Common Core Math Algebra II, Module 1, Lesson 25
Classwork
Exercises 1–4
- Calculate the following sum:
Example 1
Perform the indicated operations below and simplify
Exercises 5–8
Perform the indicated operations for each problem below.
Example 2
Simplify the following expression.
Lesson Summary
In this lesson, we extended addition and subtraction of rational numbers to addition and subtraction of rational expressions. The process for adding or subtracting rational expressions can be summarized as follows:
- Find a common multiple of the denominators to use as a common denominator.
- Find equivalent rational expressions for each expression using the common denominator.
- Add or subtract the numerators as indicated and simplify if needed.
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