Table of Contents

One, two, three, ...

The cardinal numbers are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, ... .
They answer the question, "How many?".

There are ten digits: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.

There are many ways to count. The basic way is to label the objects you want to count with consecutive numbers starting with the number 1:
 

10  11  12 

There are 12 yellow boxes. We could also count the yellow boxes with a computation:

  1 2 3
1      
2      
3      
4      
There are 4·3 yellow boxes.