Many people use one finger to count a number when asked, 'Use both fingers to count numbers.' In this How to count, to be counted using both hands is up to 0 to 10, more than to count the number of, ...

The abacus is considered the oldest calculating device used by humans but in the 1940s, a Korean man invented an abacus-like counting method using fingers called jisanbeop or chisanbop, a term that ...