Order of Operations

Order of Operations

by Mrs. Schiel

​Vocabulary

• ​Expression - representation of a quanitiy. Has no equal sign

• ​Operations - Add, subtract, multiply, divide

• Grouping symbols - parenthesis and brackets

• Simplify - means to solve

• Evaluate - means to solve

​What is the order of operations?

• ​The order of operations is the way to simplify expressions by performing operations in a specific order

​What is the order of operations?

1. ​Solve anything inside of grouping symbols ( ) { } these are parenthesis and brackets

2. Solve for exponents

3. ​Going from left to right solve any multiplication and division, which ever comes first

4. ​Going from left to right solve any addition or subtraction, which ever comes first.

​So what does it look like to solve using the order of operations?

​ Let's take a look at this following expression.

​

​

​

​Try to solve it yourself.

Poll

What did you get when you solved this? 

• 22

• 19

• I got a different answer

​So what happened?

​If you solve WITHOUT the order of operations, you would add and then multiply.

3 + 8 x 2

​11 x 2

​22

​

​If you solve WITH the order of operations you would multiply and then add.

​3 + 8 x 2

​3 + 16

​19

​Let's look at some examples

​Simplify 4 + 3 x (2 - 4)

​Step 1: Are there parenthesis? Solve what is inside. 4 + 3 x (2 - 4)

​Step 2: What's next? Is there multiplication or division? 4 + 3 x 2

​Step 3: What's next? Is there additon or subtraction? 4 + 6

​Step 4: What is your answer? 10

​Let's try another

Multiple Choice

Which is the correct order of operations?

• PEMDAS

• DASMPE

• PEMASD

• SAPMED

Multiple Choice

Which should you look for FIRST when using the order of operations. 

• Parenthesis 

• Multiplication 

• Division 

• Addition 

Multiple Choice

Which operation is performed FIRST? (13 - 1) + 4

• addition

• subtraction

• multiplication

Multiple Choice

Which operation is performed FIRST: 38 + (9 x 6) ÷ 3

• addition +

• division ÷

• multiplication X

Multiple Choice

What would be my first step? 3 + 4 x 6 - 4 =

• addition

• multiplication

• subtraction

• exponents

Multiple Choice

What are the steps to solve the following expression? 50 − 16 ÷ 2

• add, multiply

• subtract, divide

• divide, subtract

• subtract, multiply

Multiple Choice

Do you multiply or divide first? 

• Multiply

• Divide

• Go from left to right. Whichever comes first! 

Multiple Choice

Do you add or subtract first?

• ADD

• SUBTRACT

• it depends on which comes first moving left to right.