论文部分内容阅读
看到《财务与会计》第5期着重介绍了“小数乘法”运用珠算计算定位方法。现就个人在实践中的一些体验,介绍一种“简易定位法”。这种定位法可概括为两个步骤: 第一步:计算乘积。将被乘数列于算盘的左方(如能心记,亦可从略不列),将乘数列于算盘的右方;同时,应按被乘数的位数在右方预留空档。然后计算乘积,如乘数和被乘数均为整数,则所得乘积的位致,即为算盘上所示的位数。第二步:小数定位。乘数或被乘数如有小数,则须根据计算出来的乘积,确定小数点所在的位置。确定的方法是:首先,将乘数和被乘数小数点后的位数相加,即为应调整的位数;其次,根据算盘上已计算出来的乘
See the “Finance and Accounting” No. 5 focuses on the “decimal multiplication ” using the abacus calculation method. Now on some personal experience in practice, introduced a “simple positioning method.” This positioning method can be summarized as two steps: The first step: calculate the product. The multiplier will be listed on the left side of the abacus (if you have a good mind, you can also slightly do not list), the multiplier is listed on the right side of the abacus; the same time, the number of multiplicand should be left blank files. And then calculate the product, such as the multiplier and the multiplicand are integers, then the result of the product, that is, the number of digits shown on the abacus. The second step: decimal positioning. Multiplier or multiplicand If there are decimals, then according to the calculated product to determine the location of the decimal point. Determine the method is: First, the multiplier and multiplicand after the decimal point of the number of bits, that is, to adjust the number of bits; Second, according to the abacus has been calculated by the multiplication