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Ch 3: Prentice Hall Pre-Algebra Chapter 3: Decimals & Equations

About This Chapter

The Decimals & Equations chapter of this Prentice Hall Pre-Algebra Companion Course helps students learn the essential lessons associated with decimals. Each of these simple and fun video lessons is about five minutes long and is sequenced to align with the Decimals & Equations textbook chapter.

How It Works:

  • Identify the lessons in Prentice Hall's Decimals & Equations chapter with which you need help.
  • Find the corresponding video lessons with this companion course chapter.
  • Watch fun videos that cover the decimal topics you need to learn or review.
  • Complete the quizzes to test your understanding.
  • If you need additional help, rewatch the videos until you've mastered the material or submit a question for one of our instructors.

Chapter Topics

You'll learn all of the pre-algebra topics covered in the textbook chapter, including:

  • Rounding and estimating decimals
  • Calculations for mean, mode, range and median
  • Adding, subtracting, multiplying and dividing decimals
  • Evaluating math formulas
  • Triangle and rectangle perimeters
  • The metric system

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10 Lessons in Chapter 3: Prentice Hall Pre-Algebra Chapter 3: Decimals & Equations
Test your knowledge with a 30-question chapter practice test
How to Round Decimals

1. How to Round Decimals

After watching this video lesson, you will be able to look at any decimal number and round it any which way you want. Learn the tipping point that determines whether to go up to the next number or not.

How to Estimate with Decimals to Solve Math Problems

2. How to Estimate with Decimals to Solve Math Problems

Watch this video lesson to learn how you can estimate problems with decimals in them so you can get a quick answer when you need it - for example, when you are at the gas station and you need to know how much gas you can afford.

Estimating Decimal Products and Quotients

3. Estimating Decimal Products and Quotients

In this lesson, we will see how to round decimals, and we will use rounding decimals to estimate decimal products and quotients. We will look at examples to help solidify our understanding of this process.

How to Calculate Mean, Median, Mode & Range

4. How to Calculate Mean, Median, Mode & Range

Measures of central tendency can provide valuable information about a set of data. In this lesson, explore how to calculate the mean, median, mode and range of any given data set.

Calculating the Mean, Median, Mode & Range: Practice Problems

5. Calculating the Mean, Median, Mode & Range: Practice Problems

Calculating the mean, median, mode, and range of a data set is a fundamental part of learning statistics. Use this video to practice your skills and then test your knowledge with a short quiz.

Understanding and Evaluating Math Formulas

6. Understanding and Evaluating Math Formulas

With all the formulas out there, how do you know which one to pick? And how do you read formulas anyways? Watch this video lesson and you will find the answers to these questions.

Perimeter of Triangles and Rectangles

7. Perimeter of Triangles and Rectangles

Without realizing it, we calculate and use the perimeter of triangles and rectangles in regular everyday situations. Learn more about the perimeter of triangles and rectangles in this lesson, and test your knowledge with a quiz.

Adding and Subtracting Decimals: Examples & Word Problems

8. Adding and Subtracting Decimals: Examples & Word Problems

In math, we sometimes have to deal with decimal numbers instead of our nice whole numbers. Watch this video lesson to learn the one thing that you have to take into consideration when adding and subtracting decimals.

Multiplying and Dividing Decimals: Examples & Word Problems

9. Multiplying and Dividing Decimals: Examples & Word Problems

Watch this video lesson to learn what you need to do to get a correct answer when multiplying and dividing decimals. Learn the easy tricks to figuring out where the decimal point goes.

What is the Metric System?

10. What is the Metric System?

Most of the world relies on the metric system for measuring distance, weight, volume, and time. Watch this video lesson to learn what kinds of measurements are used in the metric system.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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