Order of Operations Continued

Order of Operations Continued

Are ya'll ready for today's class?!

Open Ended

What is your good thing for today?

Multiple Choice

DO NOW: What is (5+4) x 3 + 2 - 4

• 9

• 21

• 25

• 43

Lets rewind and review what we learned last week

We'll start with a word problem...

Story Time

Mrs. Matthews has one stack of 5 books and 3 stacks of 4 books. How many books does she have in all??

Multiple Choice

How many books did Mrs. Matthews have?

• 15

• 17

• 12

• 19

Open Ended

How did you figure out the number of books?

Open Ended

Is this what you did to solve the problem?

5 + 3 x 4

Open Ended

Why do you have to multiply first?

Open Ended

So you went out of order that the numbers were written?

Solve the below

 $2\ +15\ \div\ 5\ \ \times\ \left(6-3\right)$  

Now lets take a look at the meaning of parentheses and brackets

Parentheses and Brackets

• both are used to show groups in an expression or in an equation

• they mean the same thing

• when there is one set of grouping symbols, use parentheses

• the outermost set is usually brackets, although sometimes two sets of parentheses are used

PAY ATTENTION TO THESE SYMBOLS FIRST ALWAYS

( ) [ ]

Multiple Choice

_{(2 (5+3)) - 1}

• 15

• 1

• 6

• 9

Multiple Choice

What is the order of the steps for the following expression?
50- 16 x 2 ÷  (12-4)

• parentheses
  multiplication
  subtraction
  division
• parentheses
  multiplication
  division
  subtraction
• parentheses
  division
  multiplication
  subtraction
• parentheses
  subtraction
  multiplication
  division

Multiple Choice

What words can you use to help you solve simple expressions and equations?

• Please Excuse My Unlce Henriy
• Please Excuse My Dear Aunt Sally
• Does McDonalds Sell Cheese Burgers
• QPRS

Multiple Choice

(10 + 33 - 3) ÷ 8

• 13
• 3
• 5
• 11

Multiple Choice

15 x 19 + 18 ÷ 6 = 

• 250
• 199
• 400
• 288

Multiple Choice

PEMDAS only works if....

• You add then subtract
• You subtract then add
• add or subtract right to left
• add or subtract left to right

Multiple Choice

4(8) ÷ (8 − 6)

• -2
• 18
• -1
• 16

Multiple Choice

Which statement is true?

• You always multiply before you divide
• You always add before you subtract
• If two numbers are next to each other, like 3(2) that means its 32.
• You multiply and divide from left to right

Multiple Choice

Solve:
(4x2)+(4+5+2)

• 21
• 19
• 8
• 14

Multiple Choice

20 ÷ (4 - (10 - 8))

• 12
• 10
• 16

Multiple Choice

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

• add, multiply
• subtract, divide
• divide, subtract
• subtract, multiply

Multiple Choice

Find and explain the error.    
 5 - 3 + 2
     5 - 5
        0

• There is no error.
• Addition was done first and you should have subtracted first
• There is a subtraction error

Multiple Choice

What is the first step in solving this problem:
-12 ÷ 6 (-3) + 8

• multiplication
• addition
• division
• subtraction

Multiple Choice

24x(4-2)÷6

• 8
• 2
• 6
• 5

Multiple Choice

Which is the correct order of operations?

• PEMDAS
• DASMPE
• PEMASD
• SAPMED