论文部分内容阅读
珠算除法的定位,往往是在求得结果之后,根据被除数与除数的位数来确定商的位数。下面这种方法,直接在算盘上面定位,既简单,又方便,在运算之前便可确定小数点的位置了。方法:先在算盘梁上的适中位置作出○位记号(○),在○位左边依次为1位、2位、3位……,○位右边依次为-1位、-2位、-3位……;然后在1位与2位之间作出记号(·),便是商的小数点位置了(如图)。
Abacus division of the positioning, often after the results obtained, according to the number of divisor and divisor to determine the quotient median. The following method, directly above the abacus positioning, both simple and convenient, before the operation can determine the position of the decimal point. Method: Make a ○ mark (○) at the middle position on the abacus beam. The left side of the ○ position is 1, 2, 3 ..., the right side of the ○ position is -1, -2, -3 Bit ...; then mark (·) between bits 1 and 2, which is the quotient of the quotient of the quotient (as shown).