This is an excellent resource to visually illustrate adding and subtracting fractions by finding the lowest common denominator.

This site explains how to find the least common denominator. Also provides games to work on this skill.

The LCM is a useful tool to use when comparing fractions and finding common denominators.

[Free Registration/Login may be required to access all resource tools.] In this lesson students find sums of fractions with different denominators by renaming them with common denominators. Students examine guided notes, review guided...

This personal site explains how to add fractions with different denominators by finding the least common denominator. Gives problems and games to practice this skill.

In this Math Maven mystery, read the legend of Pirate Ringold and his treasure and help Frieda Finditall figure out how much gold there is left to find on this old ship. Your knowledge about addition and subtraction with fractions will...

Use the examples to find the least common denominator in order to add and subtract rational 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...

[Free Registration/Login may be required to access all resource tools.] Find differences of fractions with different denominators by renaming them with a common denominator.

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.

Here is a site that clearly and thoroughly explains solving equations with fractions by finding the least common multiple of the denominators and clearing the fractions. There are example problems solved, problems for the student to...