Intro to Inequalities

Inequalities

What is an inequality?

Compares two values. It tells us if one is less than, greater than, or equal to

Let's watch this video!

https://youtu.be/M6Efzu2slaI

(copy and paste the link)

Multiple Choice

Fill in the blank

60 _ 40

• <

• >

Multiple Choice

Fill in the blank

30 _ 35

• <

• >

Multiple Choice

Fill in the blank

-2 _ 0

• <

• >

Multiple Choice

Fill in the blank

18 _ -18

• <

• >

Multiple Choice

Fill in the blank

-5 _ -10

• <

• >

Read the inequality sign from left to right

 $<$  

less than

 $x<20$  

the value of x has to be any number smaller than 20

19, 18, 17,16...0, -1, -2, -3 and so on

Multiple Choice

 $x<10$  
Select a number that x could be?

• 10

• 9

• 11

• 12

Multiple Choice

 $x<33$  
Select a number that x could be?

• 34

• 32

• 50

• 120

Multiple Choice

 $x<0$  
Select a number that x could be?

• -1

• 9

• 1

• 12

Multiple Choice

 $x<-5$  
Select a number that x could be?

• -1

• -6

• 0

• -3

 $>$  

greater than

 $x>20$  

the value of x has to be any number larger than 20

21, 22, 23, 24, 25, 26 and so on

Multiple Choice

 $x>10$   
Select a number that x could be?

• 10

• 9

• 8

• 12

Multiple Choice

 $x>0$   
Select a number that x could be?

• 0

• -9

• -8

• 1

Multiple Choice

 $x>-9$   
Select a number that x could be?

• -10

• -9

• -8

• -12

Multiple Choice

 $x>100$   
Select a number that x could be?

• 100

• 90

• 80

• 120

 $\le$  

less than or equal to

 $x\le20$  

x has to be smaller or equal to 20

20, 19, 18, 17... 0, -1, -2 and so on

 $x\ \le8$  

The maximum number of people allowed at the pool is 8 people.

x has to be less than or equal to 8

8, 7, 6, 5, 4, 3, 2, 1, 0

Multiple Choice

 $x\le10$  
Select an answer that x could be

• 20

• 11

• 10

• 100

Multiple Choice

 $x\le1$  
Select an answer that x could be

• 2

• -1

• 10

• 12

Multiple Choice

 $x\le-5$  
Select an answer that x could be

• -2

• -1

• -10

• 10

Multiple Choice

 $x\le0$  
Select an answer that x could be

• 2

• 1

• 10

• 0

 $\ge$  

greater than or equal to

 $x\ge20$  

x has to be larger than or equal to 20

20, 21, 22, 23, 24, 25, 26, 27 and so on

 $x\ge18$  

You have to be at least 18 years old.

x has to be larger than or equal to 18

18, 19, 20, 21, 22, 23 and so on

Multiple Choice

 $x\ge10$  
Select an answer that x could be

• 20

• 9

• 7

• -1

Multiple Choice

 $x\ge100$  
Select an answer that x could be

• 200

• 90

• 70

• -100

Multiple Choice

 $x\ge-10$  
Select an answer that x could be

• -20

• -90

• -70

• -1

Multiple Choice

 $x\ge0$  
Select an answer that x could be

• -20

• 9

• -7

• -1

Multiple Choice

Which of the following is the less than symbol?

• $<$

• $\le$

• $>$

• $\ge$

Multiple Choice

Which of the following is the greater than or equal to symbol?

• $<$

• $\le$

• $>$

• $\ge$

Multiple Choice

Which of the following is the less than or equal to symbol?

• $<$

• $\le$

• $>$

• $\ge$

Multiple Choice

Which of the following is the greater than symbol?

• $<$

• $\le$

• $>$

• $\ge$