Twelve chapters cover a multitude of math concepts found in the Common Core standards for sixth grade. Each title provides a brief explanation of what you will find inside the chapter—concepts from which you can click on and learn more...

Adding and subtracting polynomials is all about combining like terms. In this article, we review some examples and give you a chance for you to practice the skill yourself.

Gain an understanding of how to add or subtract polynomials by viewing an example and a video lesson.

How to add and subtract rational expressions is explained through the use of examples and a video lesson. [2:09]

Gain an understanding of how to add and subtract integers by viewing examples and a video lesson. [0:56]

This section explores the process for adding and subtracting rational expressions. It primarily focuses on how to identify and use the Least Common Denominator to combine fractions with rational expressions.

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.

Get independent practice adding and subtracting rational numbers. Each incorrect response gets a text box explanation and another try. Correct responses are confirmed.

This lesson covers adding and subtracting rational expressions when the denominators are the same.

Get independent practice subtracting integers. Each incorrect response gets a text box explanation and another try. Correct responses are confirmed.

This section draws on previous sections that explored how to add, subtract, multiply, and divide rational numbers in order to solve real-world problems involving rational equations. It explores how to apply these procedures in order to...

This section builds from previous sections on simplifying, multiplying, dividing, adding, and subtracting rational expressions, and it investigates how to apply those skills to solving rational equations. It also covers several...

Provides examples and a video lesson that illustrates how to simplify a rational expression. [1:17]

Provides explanations and a video lesson that illustrates how to calculate with real numbers.