# Manipulating inequalities

In this lesson, we will investigate the relationship between different inequalities using bar models and "always, sometimes, never" statements.

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.I'm thinking of a number (call it x). If I multiply it by 3 then add 4 to it, what expression do I get?

1/3

Q2.I'm thinking of a number (call it x). If I multiply it by 3 then add 4 to it, my answer is less than 19. What range of values can my number take?

2/3

Q3.I'm thinking of a number, I subtract 4 from it and then divide it by 6. My number is greater than 2. What range of values can my number take?

3/3

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.I'm thinking of a number (call it x). If I multiply it by 3 then add 4 to it, what expression do I get?

1/3

Q2.I'm thinking of a number (call it x). If I multiply it by 3 then add 4 to it, my answer is less than 19. What range of values can my number take?

2/3

Q3.I'm thinking of a number, I subtract 4 from it and then divide it by 6. My number is greater than 2. What range of values can my number take?

3/3

# Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

• Click "Close Video"
• Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

# Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

Quiz:

# Manipulating inequalities

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Given that x > y, is the following inequality always, sometimes or never true? x + 2 > y + 2

1/3

Q2.Given that x > y, is the following inequality always, sometimes or never true? y > x + 5

2/3

Q3.Given that x > y, is the following inequality always, sometimes or never true? 2x > y + 4

3/3

Quiz:

# Manipulating inequalities

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Given that x > y, is the following inequality always, sometimes or never true? x + 2 > y + 2

1/3

Q2.Given that x > y, is the following inequality always, sometimes or never true? y > x + 5

2/3

Q3.Given that x > y, is the following inequality always, sometimes or never true? 2x > y + 4

3/3

# Lesson summary: Manipulating inequalities

## Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Jog

On the spot:
Chair yoga