Place in order as you’d see on a number line: 5.6, -2.99, -13.1, 6 ½, 0.199

To place the numbers in order as you would see on a number line, we need to arrange them from the smallest to the largest. Here are the given numbers:

- -13.1
- -2.99
- 0.199
- 5.6
- 6 ½ (which is equivalent to 6.5)

Now, let's list them in order:

1. -13.1
2. -2.99
3. 0.199
4. 5.6
5. 6.5

So, in order from least to greatest, we have:

-13.1, -2.99, 0.199, 5.6, 6.5