0.999999... = 1?

What the fuck. Why is that true. They got different numbers in them.

The reason why the 1=2 proof works is because you're dividing by zero during the proof.
As for The "10-.999~"=9, I'd say that it'd equal 9.000~ with a one at the end (of infinity). However, for anything non-purely theoretical, yes, you can round it and make it one.