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161app5_scinotation

# 161app5_scinotation - Appendix V Scientific Notation and...

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A5-1 Appendix V Scientific Notation and the Metric System I. Scientific notation. Recall that in the mathematical expression "2 3 " the number 2 is called the base and the number 3 is called the exponent . This expression is read as "two to the third power." To determine the number indicated by this expression, simply multiply the base (2) by itself the exponent (3) number of times. Hence, 2 3 = 2 x 2 x 2 = 8 Scientific notation is a concise, convenient way to express very large or very small numbers. The number 10 is used as the base. For example. . . 10 6 = 10 x 10 x 10 x 10 x 10 x 10 10 -6 = 1 10 x 10 x 10 x 10 x 10 x 10 2 x 10 6 = 2(10 x 10 x 10 x 10 x 10 x 10) 3.6 x 10 -6 = 3.6 x 1 10 x 10 x 10 x 10 x 10 x 10 Of course, there are easier ways to calculate the actual number written in scientific notation besides multiplying everything out. Simply remember that the exponent designates the number of places to the right or the left one must move the decimal point to achieve the actual number. When the exponent is positive, the decimal point moves to the right When the exponent is negative, the decimal point moves to the left .

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161app5_scinotation - Appendix V Scientific Notation and...

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