What are the numbers between 0 and 0.1?

0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09.

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There are an infinite number of such numbers, and they can't even all be listed out (even with an infinite list). However, (except for .1 itself) they all look like .0_____ with other digits in the blank