试析首商空盘减积除法的应用基础

Analyzing the Application Foundation of First Quotient on Blank Disk

首商空盘减积除法是珠算除法的一种简捷算法,在改商除的基础上运用心算首商,在被除数中心算减首商与除数的积,将首商、原被除数减首商与除数的积后余数一并按改商除的定位规则置于盘中,再根据改商除的方法计算第二个、第三个、……商,对末商采用提前判断,以最在限度地减少拔珠次数,提高运算速度。

This essay has introduced a kind of calculation way on abacus. That is the first quotient .It is the simple and direct calculation with an abacus,reducing the number of times of move pearls in the limit time,can improve the operation speed.