Module 2, topic 2
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Module 2, topic 2

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Module 2, topic 2 Module 2, topic 2 Presentation Transcript

  • Order of Operations
    • P arentheses
    • E xponents
    • M ultiplication
    • D ivision
    • A ddition
    • S ubtraction
    • Parentheses can mean any of the following:
    • ( ), [ ], or { }
    • Even though we say addition before subtraction, they are equals. For example, let’s simplify the following: 8 – 6 + 2. Because subtraction comes first, I do 8-6, which is 2. Then I do 2 + 2, which is 4. 
    • The same idea applies to multiplication and division.
    • = 3 + 16 – 8
    • = 19 – 8
    • = 11
    • = 36 + 7 – 21
    • = 43 – 21
    • = 22
    • = 5p + (-8p)(6) + 4p
    • = 5p + (-48p) + 4p
    • = -43p + 4p
    • = -39p
    • = -4y(2) + 15y
    • = -8y + 15y
    • = 7y
    • **Notice that the variable is in the answer!!!
    • The population of purple zebras is currently 200,000, but is decreasing at a rate of 6% each year. Use P = 200000(0.94) t , where P is population and t is time in years, to predict the number of purple zebras left after 25 years.
        • Do: P = 200000(0.94) 25
        • (I would use my calculator, and round to the nearest whole number)
        • There will be approximately 42,582 purple zebras.
    • Yadier has a checking account. He started off with $35, and adds $20 each week. If
    • m = 35 + 20w represents the amount of money, m, in the account after w weeks, find the amount Yadier has after 10 weeks.
    • Do: m = 35 + 20(10)
    • = 35 + 200
    • = 235
    • Yadier has $235 after 10 weeks.