0.019, on a tenths number line, would be in between 0 and 1 tenth. Imagine, there were ten spaces in between 0 and 0.1. 0.19 would be very close to the second space, closer to 0 than to 0.1.
For example:
\(0-0.01-0.02-0.03-0.04-0.05-0.06-0.07-0.08-0.09-0.1\)
0.019 would be very close to 0.02.
