The decimal point must be moved 2 places to the left which makes the number smaller by 2 decimal places. The same reasoning applies when the exponent is negative. First move the decimal 3 places to the right. This makes the number larger. Convince yourself why this is so.
Many calculators have the capability of handling exponential notation.
If you have such a calculator make sure you know how to enter numbers with positive and negative integers and how to read the display when in exponential notation. If you do not know how to do this it would be to your advantage to get out the instruction booklet that came with your calculator and learn how to do it. Also, if you plan to continue in more science courses and are thinking about purchasing a calculator, you might think about one that can handle exponential notation. Here are some practice problems. If you did these problems correctly, and feel confident that you understand the material present, come to the Science Learning Center staff for a post-test.