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Ch 4: Decimals and Percents

About This Chapter

The following online video lessons with quizzes can help you understand decimals and percents. Learn to read, compare and order decimals. Understand exactly what a percent signifies and look at some of the real-world uses for percentages.

Decimals and Percents - Chapter Summary

Decimals, those numbers with dots or periods in them, are just another way to show fractions. You can look at the real-world use of decimals and learn about the importance of the decimal point's location, at the beginning of this chapter. Then learn to compare and instantly decide which of two decimals is greater. Finally, you can practice sorting a group of decimals from smallest to largest or largest to smallest.

Percentages show parts of the whole, or 100%, and they're just another way to express decimals. The lesson on percents offers practice in writing percentages and gives you examples of where you'll see percentages used in the real world. By the time you finish this chapter, you should feel comfortable with the following topics:

  • Everyday uses of numbers with decimal points
  • Decimal placement, place value and reading decimals
  • Counting with decimals
  • Comparing two decimals
  • Ordering a group of decimals by counting and comparing
  • Meaning of percents
  • Percents that represent more than a hundred
  • Three methods for writing percentages

Experienced professionals present all of our lessons on decimals and percentages. In addition to the short videos, each lesson also has the written transcript of exactly what's being said, for your reference. You can get some immediate feedback on your progress by taking the quick quizzes at the end of each lesson. The videos have tags so that you can easily review specific portions of the lessons, if you wish.

8 Lessons in Chapter 4: Decimals and Percents
Test your knowledge with a 30-question chapter practice test
What is a Decimal Place Value?

1. What is a Decimal Place Value?

In this video lesson, you will see how a decimal, a simple dot, can change the place value of all the digits in a number. You will also learn how to read decimals using place values.

Comparing and Ordering Decimals

2. Comparing and Ordering Decimals

In this video lesson, you'll find out how you can look at any two decimals and immediately tell which is greater than the other. You'll also learn how to quickly sort decimals from least to greatest or vice versa.

Arithmetic with Decimal Numbers

3. Arithmetic with Decimal Numbers

Watch this video lesson and see how our little professor goes about adding, subtracting, multiplying, and dividing decimal numbers all without the use of a calculator!

Solving Problems Using Decimal Numbers

4. Solving Problems Using Decimal Numbers

Problems involving decimal numbers might sound like a way to torture you, but learning how important these types of problems are in the real world is important. In this lesson, you will see a couple areas in life where you routinely encounter decimal number problems.

What is a Percent? - Definition & Examples

5. What is a Percent? - Definition & Examples

Thinking in terms of pizza is an excellent way to think about percentages. Learn how it can help you understand percentages in this video lesson. You will also learn about the uses of percentages in the real world.

Changing Between Decimals and Percents

6. Changing Between Decimals and Percents

Watch as we go on a rollercoaster ride in changing from a decimal to percent and then back again. Learn to master this technique so you can get as fast as a rollercoaster going downhill on tests and quizzes when you have to convert between the two.

Solve Problems Using Percents

7. Solve Problems Using Percents

Percents are your friend. Think of all the cool things percents do for you. They save you money, and they tell you how well you are doing in school. Learn how you can solve problems with percents in this video lesson.

Changing Between Decimals and Fractions

8. Changing Between Decimals and Fractions

In this video lesson, you will learn about the usefulness of knowing how to change quickly between decimals and fractions. You will also learn how changing from a decimal to a fraction is different than changing from a fraction to a decimal.

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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