Khan Academy
Khan Academy: Equations With One Rational Expression
Solve equations that have one rational expression whose numerator and denominator are linear expressions. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Rationalizing the Denominator
Find a quick, concise explanation of how to rationalize the denominator. Examples are given and clearly explained.
Math Is Fun
Math Is Fun: Using Rational Numbers
This site offers simple examples for adding, subtracting, multiplying, and dividing rational numbers. It also provides examples of writing fractions in simplest form and as mixed numbers or improper fractions. Students can test their...
Help Algebra
Help algebra.com: How to Rationalize the Denominator
What do you do if the denominator contains a radical? This article explains how to rationalize a denominator that contains square roots, higher roots and the sums and differences of square roots. The examples also include problems that...
Help Algebra
Help algebra.com: Rationalizing the Denominator
Learn to simplify radical expressions by removing radicals from denominators. The demonstration includes both single radicals and binomials that require the use of a conjugate.
Mangahigh
Mangahigh: Number: Rationalize a Denominator
Test your knowledge of rationalizing a denominator by multiplying radicals.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Rationalizing the Denominator
Site gives an explaination on why we rationalize the denominator.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Rationalizing the Denominator
Tells how to rationalize the denominator when the radical has an odd index.
Oswego City School District
Regents Exam Prep Center: Practice With Rational Equations
Exercises are provided for practice with rational equations. Click the "answer" link to check your work.
Oswego City School District
Regents Exam Prep Center: Solving Rational Equations
This mathematics resource consists of notes and examples on how to solve rational equations.
Help Algebra
Help algebra.com: Simplifying Rational Expressions
The process of factoring and canceling is used to simplify, multiply, and divide rational expressions. Adding and subtracting rational expressions is also demonstrated, including finding common denominators.
Oswego City School District
Regents Exam Prep Center: Solving Fractional Equations
Use this site to learn how to eliminate the denominators to make solving these equations easier. Examples contain algebraic fractions with monomials and higher degree polynomials in the denominators.
Oswego City School District
Regents Exam Prep Center: Adding and Subtracting Fractions
Use this site to learn how to add and subtract algebraic fractions, even if there aren't common denominators. Provides plenty of examples.
Math Is Fun
Math Is Fun: Rationalize the Denominator
The tutorial examines how to rationalize the denominator. The resource consists of detailed examples and explanations about the algebra concept.
Khan Academy
Khan Academy: Add & Subtract Rational Expressions: Like Denominators
Example: Add and simplify 6/(2x^2-7) + (-3x-8)/(2x^2-7).
Khan Academy
Khan Academy: Add & Subtract Rational Expressions: Factored Denominators
Example: Add and simplify x/(2x+1)(x-7) + 2x^2/(2x-3)(x-7).
Jim Loy
Jimloy.com: Rationalizing the Denominator
Read an explanation on how to rationalize the denominator using an example. Using exponents instead of the radical sign, the examples may be difficult to read.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Zero as Denominator
Math Forum response which explains why zero can not be the denominator of any rational number.
CK-12 Foundation
Ck 12: Algebra: Sums and Differences
[Free Registration/Login may be required to access all resource tools.] This lesson covers adding and subtracting rational expressions where the denominators are different.
Lawrence Hall of Science
The Math Page: Skill in Algebra: Adding Algebraic Fractions
Here is a site that clearly and thoroughly explains adding algebraic fractions (rational expressions) both with common denominators and with different denominators. There are example problems solved, problems for the student to attempt,...
Lawrence Hall of Science
The Math Page: Skill in Algebra: Skill in Algebra: Algebraic Fractions
Explains how to find a common denominator between two rational expressions and how to reduce a fraction that involves factoring. There are example problems solved, problems for the student to attempt, and answers to the student problems....
Illustrative Mathematics
Illustrative Mathematics: A Apr Egyptian Fractions Ii
In this task, young scholars will rewrite fractions as a sum of distinct unit fractions. To solve the problem, students will rewrite a simple rational expression and will need to study the arithmetic of these unit fractions with a...
Khan Academy
Khan: Lsn 12: Exponential Functions, Equations, Expressions and Radicals
Lesson 2 of 4 for Passport to Advanced Math. Students will build quadratic and exponential functions that model a given context; solve radical equations; work with rational expressions, including fractions with a variable in the...
Oswego City School District
Regents Exam Prep Center: Radicals
Material to supplement classroom instruction on radicals: two lessons on radicals and rationalizing denominators with radicals; two practice activities where students can begin to test their skills with radicals; and a teacher resource...