Adding and Subtracting Fractions with Unlike Denominators

How Do You Find a Common Denominator and a Least Common Denominator?

This tutorial gives you some practice finding a common denominator and the least common denominator of three fractions. There's only one least common denominator, but there are many common denominators. This tutorial gives you one. Can you find another?
How Do You Add Fractions with Different Denominators?

Trying to add fractions with unlike denominators? You're going to need a common denominator first! Follow along with this tutorial and see what you need to do to add these fractions together.
How Do You Add Two Fractions with Different Denominators?

If you're adding fractions with unlike denominators, you first need to get those denominators to be the same! This tutorial shows you how to write fractions so they have common denominators and then shows you how to add those fractions together.
How Do You Subtract Two Fractions with Different Denominators?

In order to subtract fractions, they must have the same denominators. To get the same denominators, you can find equivalent fractions! This tutorial shows you how to subtract fractions with unlike denominators.