# The rule of four

In this lesson, we will learn how to calculate proportion problems using a table.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
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.If a double number line starts with 4 on the top and 3 on the bottom, what will be the first number that appears both above and below the lines?

1/5

Q2.On a double number line, 10 is above the line and 40 is below the line. What is the constant of proportionality?

2/5

Q3.On a double number line, 4 is above the line and 4.8 is below the line. What is the constant of proportionality?

3/5

Q4.What is the missing number (indicated by the empty box) on this number line?

4/5

Q5.What is the constant of proportionality for this number line?

5/5

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
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.If a double number line starts with 4 on the top and 3 on the bottom, what will be the first number that appears both above and below the lines?

1/5

Q2.On a double number line, 10 is above the line and 40 is below the line. What is the constant of proportionality?

2/5

Q3.On a double number line, 4 is above the line and 4.8 is below the line. What is the constant of proportionality?

3/5

Q4.What is the missing number (indicated by the empty box) on this number line?

4/5

Q5.What is the constant of proportionality for this number line?

5/5

# 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.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# The rule of four quiz

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

Q1.Fill in the gap: If two quantities are in the same ratio then there are _______ relationships I can use to find a missing value.

1/5

Q2.Lots of the same groups of yellow and red counters are put in a bag. Fill in the missing value in the ratio table.

2/5

Q3.Lots of the same groups of yellow and red counters are put in a bag. Fill in the missing value in the ratio table.

3/5

Q4.Lots of the same groups of yellow and red counters are put in a bag. Fill in the missing value in the ratio table.

4/5

Q5.Yellow and red counters are in the ratio 2 : 3. What fraction of the counters are yellow?

5/5

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# The rule of four quiz

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

Q1.Fill in the gap: If two quantities are in the same ratio then there are _______ relationships I can use to find a missing value.

1/5

Q2.Lots of the same groups of yellow and red counters are put in a bag. Fill in the missing value in the ratio table.

2/5

Q3.Lots of the same groups of yellow and red counters are put in a bag. Fill in the missing value in the ratio table.

3/5

Q4.Lots of the same groups of yellow and red counters are put in a bag. Fill in the missing value in the ratio table.

4/5

Q5.Yellow and red counters are in the ratio 2 : 3. What fraction of the counters are yellow?

5/5

# Lesson summary: The rule of four

## Time to move!

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

For 5 mins...

Move around:
Climb stairs

On the spot:
Dance