Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Least Common Denominator
Find a quick, concise explanation of how to find the least common denominator for fractions or rational expressions. Examples are given and clearly explained.
CK-12 Foundation
Ck 12: Algebra: Addition and Subtraction of Rational Expressions
This lesson covers adding and subtracting rational expressions when the denominators are the same.
Sophia Learning
Sophia: Addition and Subtraction of Rational Expressions
Use the examples to find the least common denominator in order to add and subtract rational expressions.
Khan Academy
Khan Academy: Algebra Ii: Simplify Rational Expressions (Advanced)
Factor the numerator and the denominator of a rational expression using advanced methods, and cancel out common terms. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive...
CK-12 Foundation
Ck 12: Algebra: Applications Using Rational Equations
[Free Registration/Login may be required to access all resource tools.] In this lesson students use lowest common denominators to solve applications involving rational equations. Students watch a video tutorial, explore guided notes and...
Khan Academy
Khan Academy: Algebra: Rational Equations (Advanced)
Solve equations that have one rational expression whose numerator and denominator are polynomial expressions. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.
CK-12 Foundation
Ck 12: Algebra: Rational Equations Using Proportions
[Free Registration/Login may be required to access all resource tools.] Use cross products and LCDs to solve rational equations.
CK-12 Foundation
Ck 12: Arithmetic: Addition of Rational Numbers
[Free Registration/Login may be required to access all resource tools.] Represent sums and differences on a number line and add and subtract rational numbers.
CK-12 Foundation
Ck 12: Arithmetic: Properties of Rational Numbers
[Free Registration/Login may be required to access all resource tools.] In this lesson students compare, classify, simplify, and order rational numbers. Students examine guided notes, review guided practice, watch instructional videos...
Texas A&M University
Wtamu Virtual Math Lab: Intermediate Algebra
This site is a tutorial for students in algebra 2 or for those who need a refresher. The site has explanations, definitions, examples, practice problems and practice tests are found covering topics such as linear equations, graphing,...
Houghton Mifflin Harcourt
Holt, Rinehart and Winston: Homework Help Independent Practice: Add and Subtract Rational Numbers 2
Get independent practice adding and subtracting fractions with unlike denominators. Each incorrect response gets a text box explanation and another try. Correct responses are confirmed.
Khan Academy
Khan Academy: Add & Subtract Rational Expressions: Unlike Denominators
Add and subtract rational expressions with relatively prime denominators by manipulating them to have the same denominators.
Texas Instruments
Texas Instruments: Rational Addition, Subtraction
This StudyCard stack covers adding (or subtracting) numerators with simple to complex denominators. The set ends with sums or differences of rational functions with different denominators.
Oswego City School District
Regents Exam Prep Center: Add and Subtract Rational (Fractional) Expressions
Add and subtract rational expressions like a pro after you use this site. Finding common denominators is made easy with this tutorial. Try the example problems to test your knowledge, then check the solutions. The 'Topic Index' page...
Other
Mainland High School: Algebra Lab: Solving Rational Equations
Rational equations are examined through notes and practice problems. Hints and solutions are included with the practice problems.
Integrated Publishing
Integrated Publishing: Rational and Irrational Numbers
Content, suitable for an introductory algebra course, explains the difference between rational and irrational numbers, how to rationalize the denominator, how to evaluate radicals and the square root process. Practice problems included.
Purple Math
Purplemath: Adding & Subtracting Rational Expressions: Introduction
Finding common denominators is no problem with Purplemath. Use this lesson to learn how to add and subtract rational expressions with these great examples.
Other
Mr. Perez Online Math Tutor: Solving Rational Equations
The mathematics tutorial investigates how to simplify rational equations, find the least common denominator as well as how to solve rational equations. There are notes, examples and an interactive applet as well as a vocabulary puzzle.
Other
Chandler Unified School District: Algebra 2: Solving Rational Equations [Pdf]
A 4-page student handout with exercises on solving rational equations using different methods.
PBS
Pbs: Logical Leaps: Adding Rational Numbers on the Number Line
In this interactive, use logic to solve riddles involving a wallaby jumping contest. Add two consecutive jumps and place them on a number line, finding equivalent fractions and common denominators to do so. Backward jumps represent...
CK-12 Foundation
Ck 12: Algebra: Solving Rational Equations Using the Lcd
[Free Registration/Login may be required to access all resource tools.] This lesson covers solving rational equations using the LCD of the denominators to eliminate them.
CK-12 Foundation
Ck 12: Algebra: Addition and Subtraction of Rational Expressions
[Free Registration/Login may be required to access all resource tools.] Add and subtract rational expressions with the same denominator and different denominators.
Khan Academy
Khan Academy: Algebra Ii: Simplify Rational Expressions: Common Binomial Factors
Factor the numerator and the denominator of a rational expression and cancel out common binomial terms. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.
Khan Academy
Khan Academy: Simplify Rational Expressions: Common Monomial Factors
Factor the numerator and the denominator of a rational expression and cancel out common monomial factors. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.