Representing a generalised number
I can use a letter to represent a generalised number.
Representing a generalised number
I can use a letter to represent a generalised number.
Lesson details
Key learning points
- A letter can be used to represent an unknown number in context.
- A letter can be used to represent a variable number in context.
- A letter can be used in an expression to represent a number in an expression.
- A bar model can be used to represent an expression.
Common misconception
Pupils often think a=1 b=2 ... or that a letter represents an object
Letters represent a numerical value either unknown or variable. Avoid always using the first letter of the words used in a scenario.
Keywords
Unknown - An unknown is a quantity that has a set value but it is represented by a symbol or letter.
Variable - A variable is a quantity that can take on a range of values.
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Video
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Starter quiz
6 Questions
Exit quiz
6 Questions
equation -
a mathematical statement showing one thing equal to another
generalised rule -
a statement that applies to all relevant cases in a scenario
unknown -
a quantity that has a set value, represented by a letter
variable -
a quantity that has a range of values.
