Order of Operations

Fix My Mistake

100

9 - 3 x 2 = 12

9 -3 x 2 = 3

200

10÷5 x 2 = 1

10÷5 x 2 = 4 

300

5 x 5 +1 = 30

5 x 5 + 1= 26

400

4 + 5 + 7 - 3 x 2 = 26

4 + 5 + 7 - 3 x 2 = 10

500

The problem was 20 - 5 x 2 + 3. My answer was 33. What did I do wrong?

I did not multiply first. The answer should be 13.

Word Stuff

100

Give the correct order of operations.

Parenthesis, Exponents (still correct if step not included), Multiplication/Division, Addition/Subtraction

200

What is the saying we use to remember the correct Order of Operations?

Please Excuse My Dear Aunt Sally

or

Pass My Dad A Sandwich

300

+  -   x  ÷ 

are called what? 

operations

400

If I have addition and subtraction in my expression, I should move from ______ ___ _______.

left to right

500

Why is it important to know PEMDAS as a mathematician?

So that everyone is solving the problem in the same way

Solve 1

100

3 + 6 x 4

27

200

25 ÷ 5 -2

3

300

12 - 8 ÷ 2 + 3

11

400

20 ÷ (8-3) + 16 

20

500

7 + 3 x (8 ÷ 4)

13

Solve 2

100

(14 + 6) x (12 -4) -9

151

200

(15 - 5) x 10  + 3

103

300

6 x 8 + ( 7 - 6 )

49

400

( 10 + 19 -5 ) x 2

48

500

2 x ( 9 x 9 + 2) - 8

158

Name the step

100

Name the first step in the expression   8 + 3 x 1 

Multiply 3 x 1 

200

Name the step that comes second in the expression 

4 x 3 + (2 +4) 

Multiply 4 x 3 

300

Name the step that comes third in the expression

9 - 5 + (3 x 2)  ÷  2

Minus  9 -5 

400

Name the step that comes fourth in the expression

10 - 5 + (3 x 2)  ÷  2

Add   5 + 3 

500

Name the fourth step in the expression

15 - 5 + (3 x 1) + (6 ÷ 3) 

Add  0 + 3