Me too, but a fairly mild case I think. I was diagnosed at 12, and mostly I transpose numbers and letters when I write. I can read just fine, but transpose numbers when I read them if I'm not careful. Basically, I just have to be REALLY careful when doing any kind of calculation! It makes stuff harder, but I've learned to deal with it and haven't had to take any special classes or anything.
But again, I've always believed I have a rather mild case. Your problem may be worse. Do you have trouble reading? As a future doctor, I'm all the more aware of my problem--I double and triple check every number I write down! God forbid I ever make a mistake with a patient's dosage some day!! But really I seem to have it under control now. I routinely recheck calcs, and as I get older I find I rarely if ever make mistakes. Transposing letters is less of a problem, so I still routinely do it when taking notes or writing...Thank goodness for spell-check!