Khan Academy: Intro to Adding Rational Expressions With Unlike Denominators

Finishing up his short series on rational expressions, Sal reviews the concept with another example. Those who have a hard time with rational expressions will appreciate the clarity with which Sal explains his process and methodology.

At just under four minutes, this video is a great way to reinforce your lecture on adding rational expressions. Add it to a review session before a unit test, or assign it for homework in your algebra class.

Reinforce instruction on the least common denominator and subtracting rational expressions with this tutorial video. Learners can view this video in class or at home. Consider using this resource to supplement your lesson plan.

Reinforce instruction on the least common denominator and subtracting rational expressions with this tutorial video. Learners can view this video in class or at home. Consider using this resource to supplement your lesson plan.

Sal demonstrates adding and subtracting rational expressions with like denominators. [3:44]

Are your young mathematicians having trouble with subtracting mixed fractions? Consider this video to supplement your teaching. An instructor explains step-by-step how to subtract mixed fractions with unlike denominators, showing viewers...

Rational expressions that are in the form of fractions. Yuk! The teacher demonstrates how to subtract one rational expression from the other when the expressions have a common denominator. Combine like terms and write it in simplest form.

Teach your class how to add two algebraic fractions with different denominators. The instructor in the video describes how to find the common denominator and demonstrates how to simplify the expression. A straightforward video, this...

Teach your class how to add two algebraic fractions with different denominators. The instructor in the video describes how to find the common denominator and demonstrates how to simplify the expression. A straightforward video, this...

You have two algebraic fractions to add together so what do you do now? You say yippee because they have a common denominator. This means that all you have to do is combine the like terms in the numerators. This would be a good segment...