SBA Math - Grade 8: Rational Expressions - Videos & Lessons

About This Chapter

We can help your child review everything he or she needs to know about rational expressions as the test date for the SBA Math Grade 8 Exam approaches. These video lessons and self-assessment quizzes can help them answer the questions on the test correctly.

SBA Math Grade 8: Rational Expressions - Chapter Summary

Your child can use the lessons found in this chapter to review what they learned in eighth grade about rational expressions as they prepare for the SBA Math Grade 8 Exam. The videos go over all the important concepts and problem-solving methods, including:

Solving rational equations
Adding and subtracting rational expressions
Practice with adding and subtracting rational expressions
Multiplying and dividing rational expressions
Practice with rational equations

Our experienced instructors carefully review what your child needs to know, providing them with step-by-step guidance and examples. By studying via video lessons, text transcripts and quizzes, your child can enjoy variety and have fun learning.

Objectives of the SBA Math Grade 8: Rational Expressions Chapter

The SBA Math Grade 8 Exam evaluates your child's knowledge and understanding of all aspects of grade eight mathematics. It is designed to see if they possess grade-level mathematics competencies. They can practice answering the kinds of questions they'll find on the exam by taking the self-assessment quizzes that come with the lessons. At the same time, they can see how well they know the material at this point in time.

There are several types of questions on the exam. Your child will find multiple-choice questions that give them a question or problem and ask them to select the correct answer from several presented. They will also solve problems and complete a classroom-based assignment.

6 Lessons in Chapter 19: SBA Math - Grade 8: Rational Expressions

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1. How to Solve a Rational Equation

A rational equation is one that contains fractions. Yes, we will be finding a common denominator that has 'x's. But no worries! Together we will use a process that will help us solve rational equations every time!

2. How to Add and Subtract Rational Expressions

Adding and subtracting rational expressions brings everything you learned about fractions into the world of algebra. We will mix common denominators with factoring and FOILing.

3. Practice Adding and Subtracting Rational Expressions

Adding and subtracting rational expressions can feel daunting, especially when trying to find a common denominator. Let me show you the process I like to use. I think it will make adding and subtracting rational expressions more enjoyable!

4. How to Multiply and Divide Rational Expressions

Multiplying and dividing rational polynomial expressions is exactly like multiplying and dividing fractions. Like fractions, we will reduce. With polynomial expressions we use factoring and canceling. I also give you a little mnemonic to help you remember when you need a common denominator and when you don't.

5. Multiplying and Dividing Rational Expressions: Practice Problems

Let's continue looking at multiplying and dividing rational polynomials. In this lesson, we will look at a couple longer problems, while giving you some practice multiplying and dividing.

6. Rational Equations: Practice Problems

Mario and Bill own a local carwash and have several complex tasks that they must use rational equations to solve for an answer. Enjoy learning how they solve these equations to help them with some of their day-to-day tasks.

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Practice Final Exam

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Visit the Smarter Balanced Assessments - Math Grade 8: Test Prep & Practice page to learn more.

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