1. 1.1 Symbols and Expressions
Use order of operations
Evaluate algebraic expressions

2. Vocabulary:
Variable: a letter used in math, such as x, that represents the unknown Algebraic Expression: has no = and contains a variable Substituting: replacing the variable with a number Evaluate: substitute a number in for the variable and calculate Grouping Symbols: Parenthesis ( ), Brackets [ ] or Set Notation { }

3. Order of Operations~ PEMDAS
Parenthesis
( )
{ }
[ ]
Exponents
Multiply L
Divide R
Addition
3+4
Subtraction
12-3

4. Order of Operations Do all grouping symbols first.
Apply Order of Operations inside grouping symbols
Find any exponents or roots
Multiply or Divide which ever comes first going from left to right
Add or Subtraction which ever comes first going from left to right

5. Order of Operations
Example 1:
{ }

6. Order of Operations
Example 2:

7. Order of Operations: Example 3:

8. Evaluate for the Algebraic Expression
Substitute what the variable =‘s into the expression
Calculate to its simplest terms
Remember to use the order of operations

9. Example 4:

10. Example: 5
5 times “t”

11. Example 6:

12. Example 7:

13. Example 8:

14. Homework Assignment: Page 7 #’s 16-40 even Remember to: 1
Homework Assignment: Page 7 #’s even Remember to: 1.) Title your homework (page #, problems assigned, name, period and #) 2.)Write each question and signify your answer 3.) Show all work and attempt all problems

15. Order of Operations by Rihana

16. Order of Operation to Umbrella
When we begin We begin together Parenthesis first now Please be clever Exponent come right next In line Then Multiply and Divide At the same time Now Subtraction and Addition Walk it out with Computations It’s the order of operations Ation, ation, ation, eh, eh Eh, eh operations!