One

The number one is the first number in a sequence of numbers known as the counting numbers.

One represents counting a single item for example 1 sweet, 1 tree, 1 cat etc.

Representing One

The number one is represented by the number:

We can also write the number one as a word like so:

Ten Frame

When learning to count you will sometimes see 1 on something called a ten frame. In this representation we have a grid of ten boxes and use a single dot to represent the number one.