Order of Operations

1
Order of Operations
43
?
( )

-
X
2
The Order of Operations tells us how to do a math
problem with more than one operation, in the
correct order.
3
Please Excuse My Dear Aunt Sally
This will help you to remember the order of
operations.
4
Please Excuse My Dear Aunt Sally
P
Parentheses ( )
E
Exponents 43
M D
Multiply x Divide ?
A S
Add Subtract -

5
Please Excuse My Dear Aunt Sally
Parentheses ( )
Always do parentheses 1st.
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Please Excuse My Dear Aunt Sally
Exponents 43
Always do Exponents 2nd.
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Please Excuse My Dear Aunt Sally
Multiply x Divide ?
Do multiplication and division 3rd, from left to
right.
8
Please Excuse My Dear Aunt Sally
Add Subtract -

Do addition and subtraction 4th, from left to
right.
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• Lets Try Some ? Problems!

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PEMDAS
323- (91)
323- 10
38-10
11-10
1
11
PEMDAS
3 (91) 62
3(10)62
3(10)36
3036
66
12
PEMDAS
45 x (6-2)
45 x 4
420
24
13
PEMDAS
4 10 x 23 -16
410 x 8 -16
4 80 -16
84-16
68
14
PEMDAS
21 102 ? 10
21100?10
21 10
31
15
PEMDAS
1072-2 x 5
10492 x 5
1049- 10
59 - 10
49
16
PEMDAS
64 ? (9 x 3-19)
64?(27 19)
64 ? 8
8
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• Have fun doing the Order of ? Operations!

18
Real World Problem

• Mr. Kellett bought 6 used CDs for 4 each and 5
  used CDs for 3 each. Simplify the following
  expression to find the amount Mr. Kellett spent
  on CDs.
• 6 ? 4 5 ? 3