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:
| 1 | 2 | 3 |
| 4 | 5 | 6 |
| 7 | 8 | 9 |
| 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 |