Did you know that the symbol/number 0.9999... (nines are repeated to infinity) also represents number 1?
So we've actually got two symbols for one number. Awesome, I know. In fact - as wikipedia states - every nonzero, terminating decimal has a twin with trailing 9s, such as 8.32 and 8.31999.
Cool mathematical trick. Well, it's not a trick, but still - cool. A bit connected to my fractals article.
0.999... Wiki - Check out proofs etc. Skepticism in education is interesting, too.