use order of operations evaluate algebraic expressions

• Use order of operations• Evaluate algebraic expressions

Variable: a letter used in math (x, y) 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 { }

PEMDAS or can it be PEDMSA?1.Parenthesis or any grouping symbols {[( )]}2.Exponents3.Multiplication or Division, which ever comes

first from left to right4.Addition or Subtraction, which ever comes

first from left to rightCan you think of a different way to remember

it besides “please excuse my dear aunt sally” ?

Try this problem with order of operations Now ignore the order of operations and

just operate from Left to Right Did you get the same answer? That is why you need order of operations!

When we beginWe begin together

Parenthesis first nowPlease be clever

Exponent come right nextIn line

Then Multiply and Divide At the same time

Now Subtraction and Addition

Walk it out with Computations

It’s the order of operationsIt’s the order of operationsAtion, ation, ation, eh, eh

Eh, eh operations!

PEMDAS

7 36 4 5

7 936 { }

7 14 1

PEMDAS

231244

44 15 2

44 30 14

Order of Operations:PEMDAS

2634

4 3 6 2

12 3 15

Mrs. Rodriguez’s Short Cut to Order of Operations:

-Underline until you get to an addition or subtraction and then lift up your pencil and start again

-This breaks down the problem into little problems

12 + 3 – 7 ∙ 2 + 812 + 3 – 14 + 815 – 14 + 81 + 8= 9

1. Substitute what the variable =‘s into the expression

2. Calculate to its simplest terms3. Remember to use the order of operations

4

5

16 20

5 4

16

40 5 6 10

5 times “t”

14 11 25

8 5 404

10 10

18 2

9

36

9

4