This week you will be learning about square numbers.
What is a square number?
A square number is the result when a number has been multiplied by itself.
For example, 25 is a square number because it's 5 lots of 5, or 5x5.This is also written as 5² ("five squared")
100 is also a square number because it's 10² (10x10,or ten squared)
All of the square numbers up to 12 x12
The first 12 square numbers are:
Why are they called square numbers?
These numbers are called square numbers because they form the area of a square.
As squares have equal sides, calculating the area is simple- just 'square' (multiply by itself) one of its sides.
For example, a square with side length 2cm would have an area of 4cm² (as 2² =4)
In reverse, if we knew that a square had an area of 9cm² , we'd know that each side would measure 3cm (as 3cm² =9)
See the diagrams below to help you visualise what a square number look like.