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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
Ch 3.2 invest 2
Ch 3.2 invest 2
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
Ch 3.2 invest 2
38 38 80
40 240 40
12 2 2
8 8 2
$ 1, 360
Ch 3.2 invest 2
Ch 3.2 invest 2
So that everyone evaluating the same expression
will produce the same result.
So that people can communicate mathematically
with each with the same understanding.

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Ch 3.2 invest 2

  • 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
  • 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.