Does 1,9999...=2?

What about 0,4999...=0,5 or 0,00...(infinite zeroes)...1 = 0?

no, no nononononon.
0.49999... is not and will never realy be equal to 0,5. There are just cases where you have to declare 0,49999 to be equal to 0,5, but that causes unprecise calculations.