1. Lesson 1.2 Apply Order of Operations
Essential Question: How do you use the order of operations to evaluate an expression?

2. Before we start…
On a 3 day trip, the Browns drove 188 miles the first day, 168 miles the second day, and 255 miles the third day. What series of calculations would you use to find the average number of miles driven each day?
Tell your partner.

3. What are the order of operations?
A set of rules established by mathematicians to evaluate an expression involving more than one operation.

4. Parentheses/Grouping Symbols
Order of Operations
Parentheses/Grouping Symbols
Exponents
Multiplication/Division
Addition/Subtraction

5. Order of Operations
Parentheses/
Grouping Symbols
Exponents
Multiplication/
Division
Addition/
Subtraction
Order of Operations
Please
Excuse My
Dear
Aunt
Sally

6. How do you use the order of operations to evaluate an expression?
The order of operations tells us which operation to complete first when there is more than one operation in an expression.
PEMDAS
Evaluate expressions inside grouping symbols.
Evaluate powers.
Multiply and divide from left to right.
Add and subtract from left to right.

12. Grouping Symbols
Grouping symbols such as parentheses ( ) and brackets [ ] indicate that operations inside the grouping symbols should be performed first.

17. Fraction Bars
A fraction bar can act as a grouping symbol. Evaluate the numerator and denominator before you divide.

27. How do you use the order of operations to evaluate an expression?

28. Ticket Out the Door
Simplify the expression on a piece of paper (put your name on it) and place it in the box on your way out…