1.2a Order of Operations

# 1.2a Order of Operations - March 13/14 2006 Order of...

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Order of Operations Pi Day Spirals Log Sheets E 63, E 65 March 13/14 2006

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Music You buy a used guitar for \$50 . You then pay \$10 for each of 5 guitar lessons. The total cost can be found by evaluating the expression 50 + 10 × 5. Is the total cost \$100 or \$300 ? In the Real World So that everyone gets the same result when evaluating an expression, a set of rules called the order of operations is always followed. Order of Operations 1 4 .

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(Please Excuse My Dear Aunt Parenthesis Exponent s Multiplication OR Division – Left to right Addition OR Subtraction Left to right

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Order of Operations To find the guitar costs as described, evaluate 50 + 10 × 5. First multiply 10 and 5 . 50 + 10 × 5 = 100 Following Order of Operations EXAMPLE 1 1 4 . = 50 + 10 × 5 ANSWER The total cost is \$100 . Then add 50 and 50. 50
Order of Operations Using the Left-to-Right Rule EXAMPLE 3 Subtract 7 from 12 . Add

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1.2a Order of Operations - March 13/14 2006 Order of...

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