Yes, in the mathematical sense they are equal numbers. Trailing zeros can be omitted in math, so `.1=.10=.100000000,` and so on.

However, if these numbers represented "real life" measurements of some kind, then a measurement of `.10`is considered more precise than a measurement of `.1`, maybe due to a better measuring technique or a better instrument. That's the idea behind significant figures.

.1 and .10 are equal. The 0 behind the 1 does not matter because there isn't any nonzero number after the 0. Therefore, it does not count.

Is .1 equal to .10?

Yes, because the trailing zeroes don't matter. Just as leading zeroes don't really matter either :

00000.1 = .1 = .100000

Granted, with sig figs, .10 is more *accurate *than .1 but I don't think that is what you are looking for.