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Order of Operations

Order of Operations. #2. A numerical expression is a mathematical phrase that includes only numbers and operation symbols. When you simplify a numerical expression, you find its value.

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Order of Operations

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  1. Order of Operations #2

  2. A numerical expression is a mathematical phrase that includes only numbers and operation symbols. When you simplify a numerical expression, you find its value.

  3. When an expression has more than one operation, you must know which operation to do first. To make sure that everyone gets the same answer, we use the order of operations.

  4. Helpful Hint The first letters of these words can help you remember the order of operations. Please Parentheses Excuse Exponents My Multiply/ Dear Divide Aunt Add/ Sally Subtract

  5. Example 1: Using the Order of Operations Simplify the expression. 15 – 10 ÷ 2

  6. Example 2: Using the Order of Operations Simplify the expression. 9 + (21 ÷ 7)  5

  7. Example 3 Simplify the expression. 7 + (24 ÷ 6)  3

  8. Example 4: Using the Order of Operations with Exponents Simplify the expression. 24 ÷ (9 – 6)  32 – 10

  9. Example 5 Simplify the expression. 32 ÷ (8 – 4)  22 – 12

  10. Real-World Application 1 Mr. Kellett bought 6 used CDs for $4 each and 5 used CDs for $3 each. Simplify the following expression to find the amount Mr. Kellett spent on CDs. 6  4 + 5 3

  11. Real-World Application 2 Ms. Nivia bought 4 new CDs for $8 each and 6 used CDs for $4 each. Simplify the following expression to find the amount Ms. Nivia spent on CDs.

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