# Dot chain sequences

In this lesson, we will learn how to group dot chains and generalise to find n-chains. We formulate calculations that represent dot chains.

#### 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.What do we mean if we describe a sequence as "descending"?

1/5

Q2.Which of the following is an example of a descending sequence?

2/5

Q3.What is the nth term of 10, 8, 6, 4, 2, ...?

3/5

Q4.What is the nth term of -4, -7, -10, -13, ...?

4/5

Q5.Find the first 5 terms of the sequence -5n + 2.

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.What do we mean if we describe a sequence as "descending"?

1/5

Q2.Which of the following is an example of a descending sequence?

2/5

Q3.What is the nth term of 10, 8, 6, 4, 2, ...?

3/5

Q4.What is the nth term of -4, -7, -10, -13, ...?

4/5

Q5.Find the first 5 terms of the sequence -5n + 2.

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:

# Dot Chain Sequences Quiz

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

Q1.What is the tracking calculation for the grouping of this 3-chain?

1/5

Q2.If the tracking calculation for this 3-chain is 8 x 3 + 1, what would the tracking calculation for a 20-chain?

2/5

Q3.What is the tracking calculation for the grouping of this 3-chain?

3/5

Q4.If the tracking calculation for this 3-chain is 3 x 7 + 3 + 1, what would be the tracking calculation for an 100-chain?

4/5

Q5.Using the grouping of this 3-chain, what is the tracking calculation for an n-chain? Write you answer as an algebraic expression.

5/5

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

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

# Dot Chain Sequences Quiz

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

Q1.What is the tracking calculation for the grouping of this 3-chain?

1/5

Q2.If the tracking calculation for this 3-chain is 8 x 3 + 1, what would the tracking calculation for a 20-chain?

2/5

Q3.What is the tracking calculation for the grouping of this 3-chain?

3/5

Q4.If the tracking calculation for this 3-chain is 3 x 7 + 3 + 1, what would be the tracking calculation for an 100-chain?

4/5

Q5.Using the grouping of this 3-chain, what is the tracking calculation for an n-chain? Write you answer as an algebraic expression.

5/5

# Lesson summary: Dot chain sequences

## Time to move!

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

For 5 mins...

Move around:
Walk

On the spot:
Chair yoga