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MULTIPLICATION AND DIVISION IN SCIENTIFIC NOTATION
 Part 1: How Do we Multiply numbers in Scientific Notation? Scientific Notation is based on powers of the base number 10. The number 123,000,000,000 in scientific notation is written as : The first number 1.23 is called the coefficient. It must be greater than or equal to 1 and less than 10. The second number is called the base . It must always be 10 in scientific notation. The base number 10 is always written in exponent form. In the number 1.23 x 1011 the number 11 is referred to as the exponent or power of ten. Rules for Multiplication in Scientific Notation: 1) Multiply the coefficients 2) Add the exponents (base 10 remains) Example 1: (3 x 104)(2x 105) = 6 x 109 What happens if the coefficient is more than 10? Example 2: (5 x 10 3) (6x 103) = 30. x 106 While the value is correct it is not correctly written in scientific notation, since the coefficient is not between 1 and 10. We then must move the decimal point over to the left until the coefficient is between 1 and 10. For each place we move the decimal over the exponent will be raised 1 power of ten. 30.x106 = 3.0 x 107 in scientific notation. Example 3: (2.2 x 10 4)(7.1x 10 5) = 15.62 x 10 9 = 1.562 x 10 10 Example 4: (7 x 104)(5 x 106)(3 x 102) = 105. x 10 12 --now the decimal must be moved two places over and the exponent is raised by 2. Therefore the value in scientific notation is: 1.05 x 10 14 Now Try these: (write your answers in the form of coefficientx10^exponent) If your answer is 3.5 x 10 3 you should type 3.5x10^3 in the box then click the submit button). (2 X 103)(4X104)= (6 X 105 )(7 X 10 6)= (5.5 X 107)(4.2 x 104)= What happens when the exponent(s) are negative?We still add the exponents, but use the rules of addition of signed numbers. Example 5: (3 x 10 -3) (3x 10-3) = 9. x 10-6 Example 6: (2 x 10 -3) (3x 108) = 6. x 10-5Now Try these: (write your answers in the form of coefficientx10^exponent) If your answer is 3.5 x 10 3 you should type 3.5x10^3 in the box then click the submit button).   (3 X 10-6)(2X10-4)= (5 X 10-5 )(7 X 10 10)= (5.5 X 10-7)(4.2 x 104)= (5 X 107)(8 x 10-6)(4.2 x 104)=  Go to Division in Scientific Notation
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