See foot in mouth!! I wonder why they teach us in school that .1 is a tenth!!!! Oh well, understood... Thanks!
What you have is 0.1" is 1/10th of an inch. That is the same as 100/1000 of an inch. It will always be 0.1" even if you see it as 0.10" or 0.100" or 0.1000". When we speak of 1/10th we are talking of a tolerance of .0001 of an inch.
Clear as mud, sorry. it takes a little practice to get the hang of it. Good luck