주산과암산Full at Mac App Store analyse

“abacus calculation and mental arithmetic" is a brand new application which institutes a way that helps children through forming an idea of the abacus to comprehend such as addition, subtraction, multiplication and division. "abacus calculation and mental arithmetic" is made up of three of the modes, its tutorial, practicing portion and real game portion. Through this game, everyone can not only be able to expect growth of their mathematical ability, concentration and brain development but also have some competition with people through its rank service system.