When we write number words in numerals we look at the hundreds, tens and units.

Let's look at **three hundred and forty-five.**

This is **three **hundred, **forty** and **five**.

345 = 300 + 40 + 5

Or **three **hundred, **four tens** and **five units.**

In a three-digit number the digits go in columns like this:

Hundreds |
Tens |
Units |

3 | 4 | 5 |

Three hundred and forty-five is written as 345.