Year 8
These resources will be removed by end of Summer Term 2025.
Switch to our new teaching resources now - designed by teachers and leading subject experts, and tested in classrooms.
These resources were created for remote use during the pandemic and are not designed for classroom teaching.
Lesson details
Key learning points
- In this lesson, we will learn how to group dot chains and generalise to find n-chains. We formulate calculations that represent dot chains.
Licence
This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
Loading...
5 Questions
Q1.
What do we mean if we describe a sequence as "descending"?
The sequence is all negative numbers
The sequence is less important
Q2.
Which of the following is an example of a descending sequence?
-12, -10, -8, -6, ...
-5, -4, -3, -2, ...
3, 4, 5, 6, ...
Q3.
What is the nth term of 10, 8, 6, 4, 2, ...?
-2n + 8
2n + 12
2n + 8
Q4.
What is the nth term of -4, -7, -10, -13, ...?
-3n + 1
-4n + 7
3n - 7
Q5.
Find the first 5 terms of the sequence -5n + 2.
-5, -3, -1, 1, 3
-5, 2, 9, 18, 27
-7, -12, -17, -22, -27
5 Questions
Q1.
What is the tracking calculation for the grouping of this 3-chain?
27
8 + 8 + 1
9 x 3 + 1
Q2.
If the tracking calculation for this 3-chain is 8 x 3 + 1, what would the tracking calculation for a 20-chain?
20 x 3 + 1
8 x 3 + 20
Q3.
What is the tracking calculation for the grouping of this 3-chain?
3 x 6 + 3 +1
3 x 7 + 4
3 x 8 + 3 + 1
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?
100 x 7 + 100 + 1
100 x 7 + 4
3 x 100 + 100 + 1
Q5.
Using the grouping of this 3-chain, what is the tracking calculation for an n-chain? Write you answer as an algebraic expression.
3n + 1
3n + 8
n x 8 + 1