How to add a number to a list

I will like to write a python code to add 0.1 to every element of x: x = '0.01 0.02 0.03 0.60 0.10' so that new x = '0.11 0.12 0.13 0.70 0.20' if have tried this code:

for i, v in enumerate(x):
   x[i] = v + 0.1

But this doesn't work.

Can anyone pls help?