In this lesson, you will learn how to use scientific notation. Scientific notation is used to write down very large or very small number by using powers of 10. We use positive powers of 10 to write large numbers because multiplying by a power of ten just moves the decimal point to the right. We also use negative powers of 10 to write very small numbers because that will just move the decimal to the left. Scientific notation is used in science, engineering, and math.
