1-7 Multiplying and Dividing Integers Steps: Multiply or divide the regular way Figure out the sign of the answer Rules for Multiplying and Dividing: a.

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Presentation transcript:

1-7 Multiplying and Dividing Integers Steps: Multiply or divide the regular way Figure out the sign of the answer Rules for Multiplying and Dividing: a positive and a negative is negative a negative and a negative is positive

1.) -9(4) = 2.) (-5)(-3) = 3.) 3(-12) 4.) -15 (-8) = 5.) 144  (-12) =6.) -34  17 = 7.) -210  (-30) = 8.) 14  0 = 9.) 0  14 = 10.) 21 (-4)

When multiplying more than two integers count the number of negative integers. If the number of negative integers is even the product is positive If the number of negative integers is odd the product is negative 1.) (-1)(-1)(-1)(2) = 2.) (4)(-2)(5)(-4) = 3.) -4(-2)(4)(-1)(1)= 4.) (-2)(-2)(-2)(-2)(2)=

Finding the mean(average): Find the sum of the numbers Divide the sum by then number of numbers Find the mean. 1.) -9 , -12 , 9 , 4 , -2 

Word Problems 1.) Bertha and Vernon are competing in a diving competition. Bertha's dive ended -40 m from the starting platform. Vernon's dive ended -5 m from the starting platform. How many times farther was the end of Bertha's dive than the end of Vernon's dive? 2.) The altitude of an airplane is decreasing at a rate of 40 feet per second. What is the change in altitude of the airplane over a period of 25 seconds?

* 5.) (-3) ) (-7 -9) + (-5) Demonstrate Understanding: Show all steps. 1.) ) ) (-13)(1)(-11)4.) 91 (-7)