Order of Operations (1).ppt

Order of
Operations
( ) +
X
-
43


The Order of
Operations tells us
how to do a math
problem with more
than one operation,
in the correct order.

Please Excuse My Dear
Aunt Sally
This will help to
you to remember
the order of
operations.

Add +
Subtract -
Multiply x
Divide 
Please Excuse My Dear Aunt Sally
P
E
M
D
A
S
Parentheses ( )
Exponents 43

Parentheses ( )
Always do
parentheses 1st.

Exponents 43
Always do
Exponents 2nd.

Multiply x
Divide 
Do multiplication
and division 3rd,
from left to right.

Add +
Subtract -
Do addition and
subtraction 4th, from
left to right.

Let’s Try
Some 
Problems!

PEMDAS
3+23- (9+1)
3+23- 10
3+8-10
11-10
1

PEMDAS
3 (9+1) + 62
3(10)+62
3(10)+36
30+36
66

PEMDAS
4+5 x (6-2)
4+5 x 4
4+20
24

PEMDAS
4+ 10 x 23 -16
4+10 x 8 -16
4+ 80 -16
84-16
68

PEMDAS
21 + 102  10
21+10010
21 + 10
31

PEMDAS
10+72-2 x 5
10+49–2 x 5
10+49- 10
59 - 10
49

PEMDAS
64  (9 x 3-19)
64(27 –19)
64  8
8

Have fun
doing the
Order of 
Operations!

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