1.3 1.3 Order of Order of

OperationsOperations( ) +

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 SallyPEMDAS

Parentheses ( ) Exponents 43

Please Excuse My Dear Aunt Sally

Parentheses ( )

Always do parentheses

1st.

Please Excuse My Dear Aunt Sally

Exponents 43Always do Exponents

2nd.

Multiply x Divide

Please Excuse My Dear Aunt Sally

Do multiplication

and division 3rd, from left to

right.

Add + Subtract -

Please Excuse My Dear Aunt Sally

Do addition and subtraction 4th,

from left to right.

LetLet’’s Try s Try Some Some Problems!Problems!

PEMDAS3+23– (9+1)3+23– 10

3+8-1011-101

PEMDAS3 (9+1) + 623(10)+62

3(10)+3630+3

6 66

PEMDAS 4+5 (6-2) 4+5 (4)

4+2024

PEMDAS4+ 10 ( 23 )-164+10(8) -164+ 80 -

1684-1668

PEMDAS 21 + 102 1021+10010

21 + 10 31

PEMDAS10+72-2 (5) 10+49–2(5)

10+49- 10 59 -

1049

PEMDAS64 [9(3)–19]

64(27 –19) 64 8

8