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Order of Operations

Order of Operations. By Amy Beyer. Order of Operations. First do what is inside parenthesis Next multiply and divide Last add and subtract. Order of Operations. If there is multiplication and division or addition and subtraction in the same do them in order from left to right. Example:

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Order of Operations

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  1. Order of Operations By Amy Beyer

  2. Order of Operations • First do what is inside parenthesis • Next multiply and divide • Last add and subtract

  3. Order of Operations • If there is multiplication and division or addition and subtraction in the same do them in order from left to right. • Example: • 5(2 + 4) ÷ 10 – 1 = ? • 5(6) ÷ 10 – 1 = ? • 30 ÷ 10 – 1 = ? • 3 – 1 = 2

  4. Helpful way to Remember the Order of Operations • Please Excuse My Dear Aunt Sally • P in Please stands for Parenthesis • E in Excuse stands for Exponents • M & D in My & Dear stands for Multiply and Divide (from left to right • A & S in Aunt & Sally stands for add and subtract (from left to right)

  5. Using Order of Operations 7 + 3 × 5 = ? 7 + 15 = ? 7 + 15 = 22 Not using Order of Operations 7 + 3 × 5 = ? 10 × 5 = ? 10 × 5 = 50 By not using the order of operations it changes the answer. Problems not done using the Order of Operations

  6. 5 × 4 + 6 ÷ 3 = ? 20 + 2 = 22 First multiply and divide. Do 5 × 4 and then do 6 ÷ 3 Last add the two answers together Example 1

  7. First do what is inside the parenthesis Then multiply 8 by 3 Last add the 6 8 × (4 – 1) + 6 = ? 8 × 3 + 6 = ? 24 + 6 = 30 Example 2

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