I used to learn abacus and had do it for 2 years..

I am not sure if its me but I could've easily done 2 digit calculations in literal seconds... using the abacus model

Then our classes of abacus were shut and the thing is, that now I found myself a slight degradation because with abacus there was an assured confidence but then after abacus I used to blunder tiny things like 6+7=15 and 7*6 and other things.

Maybe my personal experience with abacus was how it ended. I had it for 4 semesters and got 4 medals in abacus for getting full marks but I still believe that it made my common maths, which it meant to improve a little weaker because well now although I don't pull up an abacus in my mind, I still have all the learning of basic things like 6+7=13 and other stuff but for some utter magical reason, learning abacus made me confuse it.

Overall it was a great experience though, seeing my cousins surprised that I was doing 2 digit numbers like 42x 37 calculation in 10 seconds in my mind while playing pass ball at 5th grade, maybe that was one of my peak achievements as I guess I have forgotten abacus completely...

I also remember one of my cousin saying that abacus looks like a music instrument and he used to make a little music out of it. Maybe fun times indeed. I remember it was the same day that I discovered the badlands biome in minecraft, maybe I was in 4th grade. Gold is really common in badlands, I remmeber going into the cave if I am correct.

Edit: also I meant not any hate towards abacus or maybe its just skill issue from my side and I just felt like saying it. I don't know why but for the most part although I still do these mistakes, I used to do it on a much higher frequency after stopping abacus and then covid hit and although I was a strong math student logically, I used to do some mathematical blunders.., for the most part they happen rarely now but still they sometimes do exist when my brain gets into too much auto pilot mode and I usually just prefer to solve calculations in the end because of this in any question or whatever, and maybe only just simplify things at most in intermediate steps so that I do least amount of mistakes possible. I usually don't think about this too much but I used to think that damn I am bad at this and used to remember the abacus past but then I saw some comments on reddit etc. saying that there were whole calculus phd teachers who sometimes did silly mistakes and maybe it was okay... felt really better about myself.