# Expressing missing numbers algebraically

## Lesson details

### Key learning points

1. In this lesson, we will be finding the unknown values in algebraic expressions.

### Licence

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## Video

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## Worksheet

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## Starter quiz

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### 4 Questions

Q1.
What would be the next term in this sequence? 4.5, 4.75, 5, 5.25, 5.5, 5.75
5.5
6.25
6.5
Q2.
What is the term to term rule in this sequence? 9.2, 9.15, 9.1, 9.05
- 0.5
+ 0.05
+ 0.5
Q3.
What would be the previous term in this sequence? -3, -1, 1, 3, 5
-4
6
7
Q4.
Look at the following sequence, which term below can not be part of that sequence? 56, 61, 66, 71, 76
1001
1006
1016

## Exit quiz

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### 5 Questions

Q1.
t + 7 = 20 What is the value of t?
t = 10
t = 12
t = 27
Q2.
If 5a = 35 What is the value of a?
30
40
6
Q3.
How could we express the perimeter of the rectangle below?
4a
a + b
ab
Q4.
How could we express the perimeter of the square below?
2r
r + 4
r + s
Q5.
If 2f + 6= 20. What is the value of f?
6