About This Chapter
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.
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.
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.
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!
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.
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.
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.
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.
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.
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Other chapters within the SAT Subject Test Mathematics Level 1: Practice and Study Guide course
- Basic Arithmetic Calculations
- Rational Numbers
- Square Roots
- Basic Algebraic Expressions
- Algebraic Linear Equations & Inequalities
- Algebra: Absolute Value Equations & Inequalities
- Algebra: Polynomials
- Understanding the Basics of Functions
- Algebra: Rational Expressions
- Mathematical Sequences
- Understanding Exponentials & Logarithms
- Complex and Imaginary Numbers
- Coordinate Geometry - Graphing
- Lines and Angles
- Properties of Triangles
- Properties of Circles
- Finding Perimeter, Area & Volume
- Solid Geometry
- Trigonometry Basics
- Understanding Probability & Statistics
- SAT Subject Test Mathematics Level 1 Flashcards