In bash, how can I modify a `float` so that the part coming before the dot is having at least two digits?

I want to make numbers in **Column A** be displayed as in **Column B**:

```sh
A (Current)   B (Desired)
-----         ------
8.456         08.456
4.19          04.19
3.5           03.5

```

I did a lot of searches, but most of what I found talked about how to display numbers with *N* decimals (e.g. `17.7647 to 17.76`) which was of no help.