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Multiplying and Dividing Integers 1.9
Rules: Multiply or divide SAME sign the product or quotient is POSITIVE Examples: 1.) -2∙ (-22)= 2.) -45÷ (-9)=
Rules: Multiply or divide DIFFERENT SIGNS the product or quotient is NEGATIVE Example: 1.)24÷ (-24) 2.) -4 ∙ 12
Rules: Anytime you multiply by 0 your product is 0 Examples: 1.) 50000 (0) (12) (-3) 2.) -415(0)
More than 2 terms: Count the number of negative signs. If you have a(n): – ODD amount of negative signs your answer is NEGATIVE – EVEN amount of negative signs your answer is POSITIVE
Examples: 1.) -9(-8)(-5) 2.)
Average Add up all the numbers in the set and divide by the amount that were added Example: Find the average from the group Football yardage:10,-57,9,-11
Homework TB pg 47 (12-48 even and 54-58 even)
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Example 1 Dividing Integers Same sign, so quotient is positive. 5 = a. 8 – 40 – b. 14 – 2 = 7 – Different signs, so quotient is negative. c. 9 – 36 = 4.
Natural Numbers The Natural or counting numbers are denoted by N and are defined by:
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EXAMPLE 1 Same sign, so quotient is positive. = –7 Different signs, so quotient is negative. c. 36 –9 = –4 Different signs, so quotient is negative. =
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