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I love the fancy Japanese abacus I bought at a thrift shop, it's very nice and simply elegant. I also really enjoyed learning to use it, it was surprisingly ea

I love the fancy Japanese abacus I bought at a thrift shop, it's very nice and simply elegant. I also really enjoyed learning to use it, it was surprisingly easy. I also really have enjoyed learning more about "abacus culture". There are students so good with them that they don't even need abacus' anymore. They just use "air abacus'"

jacquesm 3y ago
The brain will really never cease to amaze me, that's a very interesting story. So they have internalized the abacus to the point that it's entire state is present in their head. I wonder how long they can maintain that state and if they are able to mentally put it aside for a while, perform another calculation and then recall the stored one. I've seen a similar thing with a really good chess player friend of mine, he could play without actually looking at the board.
WillAdams 3y ago
Similarly, there is a Korean counting system, Chisanbop, which works quite well up to 99: https://sciencing.com/finger-math-basic-addition-counting-4861020.html https://sciencing.com/finger-math-basic-addition-counting-48...