Eff this, philly mike is an idi0t, ask zdunklee.

[zdunklee]

you can't round an infinite decimal and still have the same number you started with.

exactly, which is why .999... is a separate number, because the only way to make it 1 is to round up to the nearest finite number.

oh and by the way, i was looking back at this whole argument and there is something that doesn't make sense in your original argument with this.

x = 0.9999...
10x = 9.9999...
10x - x = 9.9999... - 0.9999...
9x = 9
x = 1.

this is incorrect
this is how it should be

x = 0.9999...
10x = 9.9999...
10x - x = 9.9999... - 0.9999...
9x = 8.9999...
x = 0.9999...

so even your own original statement shows no proof.

For the first part, no this is not true, you do not round 0.999... ever and I don't get what you do not understand, please look up the definitons of Real and Rational numbers like I suggested. Unlike most science math is not a debatable subject, as proofs are concrete and opinion means absolutely nothing.

As for the second, this is another example of you not being able to think in terms of infinity. I want you to SHOW me why 9.999... - 0.999... = 8.999, it doesn't ever. I can clearly see that you don't use math very often... just by the terrible mistakes you are making that are simple to other here as well.

BTW that is one of the smiplest proofs I can give you, if you want me to give you the real calculus based proof I can do that, but I don't think you will understand the first line of it.