PEMDAS Review

PEMDAS Review

What is PEMDAS?

• PEMDAS is an acronym that helps us solve expressions using order of operations.

• Order of operations tells us the steps it takes to solve an expression.

• For example: 2 + 5 - (6+1) x 2

Examples for solving left to right

 $12\div3\times4$  

• Solve  $12\div3$  FIRST ; NOT  $3\times4$  

• Wrong way:  $12\div12=1$  

• Correct way:  $4\times4=16$  

Multiple Choice

What step would I do first? (Hint: use PEMDAS)
 $\left(4+5\right)\ -3\ \times2$  

•  $\left(4+5\right)$  Parantheses

•  $\times2$  Multiplication

•  $-\ 3$  Subtraction

• None of the above

Multiple Choice

What step would I do second? (Hint: Use PEMDAS)
 $9-3\ \times2$  
 

• Subtraction  $9-3$  

• Multiplication  $3\times2$  

A look at what we just did:

• Step 1: $\left(4+5\right)-3\times2$  

• Step 2:  $9-3\times2$  

• Step 3:  $9-6$  

• Step 4:  $3$  

Poll

 $6+\left(2\times5\right)\div2$  

Checkpoint: Can you solve this problem on your own using PEMDAS?

• Yes, by myself

• Maybe, with Ms. Jacqui and Ms. Julia's help

• No, I still don't understand

Multiple Choice

What step would I do first? (Hint: use PEMDAS)

 $6+\left(2\times5\right)\div2$  

• Division  $\div2$  

• Addition  $6+$  

• Parentheses  $\left(2\times5\right)$  

• None of the above

Multiple Choice

What step would I do second? (Hint: use PEMDAS)

 $6+10\div2$  

• Division  $10\div2$  

• Addition  $6+10$  

Challenge Questions! Choose 1 question to work on, put the answer + spice level in the chat

• Mild: $10-\left(12\div4\right)$  

• Medium: $10-\left(12\div4\right)\times3$  

• Hot:  $10-\left(12\div4\right)\times3+2^2$  

• Extra Spicy:  $10-2\left(12\div4\right)\times3+2^2$