Similarly, there is a Korean counting system, Chisanbop, which works quite well up to 99: https://sciencing.com/finger-math-basic-addition-counting-4861020.htm

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...