1. Chapter 3.2
Investigation 2
Order of Operations
Lesson Goal:
• You use the order of operations to evaluate expressions.
• You will review how fractions bars can be used as grouping
symbols

4. Order of Operation:
PEMDAS:
P – evaluate expressions inside parentheses
E- simplify exponents
M- do multiplication OR
D- do division from left to right
A- do addition OR
S- do subtraction from left to right
Use the following phrase to remember this order:
Please Excuse My Dear Aunt Sally

6. 38 38 80
40 240 40
12 2 2
8 8 2

7. $ 1, 360

10. So that everyone evaluating the same expression
will produce the same result.
So that people can communicate mathematically
with each with the same understanding.