1. Homework Questions?

2. Homework Check
HomeWork
Check!

3. Order of Operation
Lesson 1.2

4. Learning Targets
Use the order of operations
Use grouping symbols

5. Order of Operations What do you remember about Order of Operations?
Does it matter the order that I work any problem?

6. Video
Abbott and Costello
What happened?

7. PEMDAS P- Parenthesis E- Exponents M- Multiplication D- Division
A Addition
S Subtraction

8. Definition
The order in which you perform operations can affect the value of an expression. To avoid confusion, mathematicians have agreed on an order of operations. Multiply and divide first. Then add and subtract.

9. Definition
To simplify a numerical expression, you use the order of operations and replace the expression with the simplest name for its value.

10. Key Concepts Order of Operations Work inside Grouping symbols.
Multiply and Divide in order from left to right.
Add and subtract in order from left to right.

11. Example
In your Notebook
Simplify ÷ 3.

12. Practice
In your Notebook
Simplify 12 ÷ 3 – 1
Simplify 10 – 1 · 7

13. Note Page Examples
8 – 2 • 2
12 ÷ 3 – 1 • 2 + 1

14. Quick Check (Note Page)
2 + 5 x 3
12 ÷ 3 – 1
10 – 1 • 7

15. Practice
Simplify 3 • 5 − 8 ÷ 4 + 6

16. Practice
Simplify 4 – 1 · ÷ 3
Simplify · 4 ÷ 3 – 1

17. Rules Order of Operations Work inside grouping symbols Exponents
Multiply and divide in order from left to right.
Add and subtract in order from left to right.

18. Grouping Symbols
Start with the innermost grouping symbol when there is more than one level of grouping symbols.
Levels of Grouping Symbols
{ [ ( ) ] }
Brackets
Braces
Parenthesis

19. Examples
Simplify
20 – 3 [(5 + 2) – 1]

20. Quick Check (NP) 4 – 1 • 2 + 6 ÷ 3 5 + 6 • 4 ÷ 3 – 1 2 [(13 – 4) ÷ 3]
−2 4

21. Check 4 Understanding

22. Homework
Pg. 11 (1-31) ODD
Answers will be on Moodle