1. 43
Order of Operations 
( ) + - X

2. Who is right?
Problem: Evaluate the following arithmetic expression:
3 + 4x 2
3 + 4 x 2 = =11
3 + 4 x 2 = 7 x 2 =14
We want everyone to get the same answer so we must follow the order of operation.

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

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

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

6. Please Excuse My Dear Aunt Sally
Parentheses ( )
Always do parentheses 1st.

7. Please Excuse My Dear Aunt Sally
Exponents 43
Always do Exponents 2nd.

8. Please Excuse My Dear Aunt Sally
Multiply x
Divide 
Do multiplication and division 3rd, from left to right.

9. Please Excuse My Dear Aunt Sally
Add +
Subtract -
Do addition and subtraction 4th, from left to right.

10. The “AS” 8 + 7 - 5 + 2 Represents Add and Subtract
Do which ever one of these comes first
Work left to right

11. Let’s Try Some  Problems!

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

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

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

15. PEMDAS
4+ 10 x
4+10 x 8 -16
84-16 68

16. PEMDAS
 10
21+10010 31

17. PEMDAS
x 5
10+49–2 x 5 49

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

19. Have fun doing the Order of  Operations!