2011-01-25, 10:55 PM
http://webhome.idirect.com/~totton/sorob...NDBOOK.pdf
Well, the abacus sure can be used for complicated calculations. This version, the Soroban, is the Japanese one, but you get the point.
Well, the abacus sure can be used for complicated calculations. This version, the Soroban, is the Japanese one, but you get the point.