
Keep or Flip the Inequality Symbol
Presentation
•
Mathematics
•
6th - 9th Grade
•
Hard
Joseph Anderson
FREE Resource
8 Slides • 11 Questions
1
Module 7: When to flip inequality symbols?
​
2
Multiple Choice
Solve the inequality below and explain your steps.
To solve the inequality, you need to isolate the variable by dividing 3 on both sides to get x>−12 .
To solve the inequality, you need to isolate the variable by dividing 3 on both sides to get x>12 .
To solve the inequality, you need to isolate the variable by multiplying 3 on both sides to get x>108 .
To solve the inequality, you need to isolate the variable by multiplying 3 on both sides to get x>−108 .
3
To solve a two-step inequality:
1st step: undo addition/subtraction
2nd step: undo multiplication/division
4
Multiple Choice
Solve the inequality below.
9p+10≤11
p≤9
p≤91
p≤189
5
Poll
True or False:
Is 1 < 2 ?
True
False
6
Poll
True or False:
Is 4 < 6 ?
True
False
7
If you multiply or divide both sides by a positive number, are the inequalities still true?
​
8
If you multiply or divide both sides by a negative number, are the inequalities still true?
​
9
False
What can we do to the inequality to make it true?
10
11
12
13
Multiple Select
Which inequalities will have the inequality symbol flipped in the solution? Check ALL that apply.
A
B
C
D
14
Multiple Choice
Does the inequality sign flip?
2x < 20
Yes
No
15
Multiple Choice
Does the inequality sign flip?
Yes
No
16
Multiple Choice
Does the inequality sign flip?
Yes
No
17
Multiple Choice
Does the inequality sign flip?
y - 9 < 55
Yes
No
18
Multiple Choice
-8y - 9 < 55
19
Multiple Choice
13 + 5x < -25
Module 7: When to flip inequality symbols?
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