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1-2 Order of Operations

1-2 Order of Operations. Goals Use order of operations to evaluate expressions. Vocabulary. Order of Operations – the process used to simplify math expressions systematically. PEMDAS. Please Excuse My Dear Aunt Sally P – Parenthesis E – Exponents M, D – Multiplication and Division

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1-2 Order of Operations

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  1. 1-2 Order of Operations Goals Use order of operations to evaluate expressions

  2. Vocabulary • Order of Operations – the process used to simplify math expressions systematically

  3. PEMDAS Please Excuse My Dear Aunt Sally • P – Parenthesis • E – Exponents • M, D – Multiplication and Division • A, S – Addition and Subtraction

  4. Examples • 4 + 3 · 2 – 6 ÷ 3 • 8 ÷ 2 + 4 · 6 • 3 · 42 • 2(4 + 8) – 9 • 24 – 8 + 6 • 15 ÷ 3 · 2 • 16 + 4 ÷ 2 – 3 • 8 • 28 • 48 • 15 • 22 • 10 • 15 • ½

  5. Examples with variables • 3x2 + 1 when x = 4 • 32 ÷ x2 – 1 when x = 4 • 3(x2 + 1) when x = 2 • 4x3 + 1 when x = 3 • when x = 9 • 49 • 1 • 15 • 109 • 5

  6. Practice • Page 12 #1-12

  7. Word Problem #1 Suppose you live in a state that charges no sales tax on essentials, such as clothes or food, but charges 6% sales tax on nonessentials, such as CDs or games. You decide to buy a sweatshirt for $24 and a video game for $39. What is your total bill? $65.34

  8. Word Problem #2 According to the California Department of Forestry, an average of 539.2 fires each year are started by burning debris, while campfires are responsible for an average of 129.1 each year. How many total fires would you expect there to be in five years? 3342 fires

  9. More Practice • Page 12 #13 and 14

  10. Homework • Page 13 #16-34 even #40-48 even #37 and 55

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