一个现代人,不论男女老幼,他都要无可逃避地置身于数字和数字计算中——数字化生存、数字计算化生活,如影随身,难解难分。数字计算,是从孩提时期就在练习着的,也许是从咿哑学语时掰着小手数小手指的时候就开始了。然后,就是进入小学、中学……不就是0、1、2、3、4、5、6、7、8、9这么一串十个数字吗?它们与一些数字计算符号联系起来,什么加、减、乘、除啊,平方、开平方啊……就成了一个又一个的问题,这一道道计算题的最后或者背面,都隐有它的特定的、正确的答案——我们通常也说是结果。寻找数字计算的正确答案或称结果,是每一个计算者孜孜以求的,有时却并不轻松。虽然背熟了“小九九”歌诀,也掌握了必需的常规“经典”运算规则,运算这一操作步骤往往仍然是费时费事的。能不能算得更快些?譬如少年儿童常常碰见的加、减、乘、除、平方、开 A modern man, irrespective of age and sex, must inevitably find himself in the digital and digital computing - digital survival and digitalized life. Numerical calculations are practiced from childhood, perhaps starting from the time when the little fingers of the small hands are broken. Then, is to enter elementary, middle school ... is not 0,1,2,3,4,5,6,7,8,9 such a string of ten numbers? They are associated with some of the figures calculated symbols, what plus, Subtracting, multiplying, dividing, squaring, squaring and so on ... becomes a problem one after another, with the specific and correct answer to the final or the back of this round of calculation - we usually say Is the result. Finding the right answer or result of a numerical calculation is something that every one of the builders diligently pursues, and sometimes it is not easy. Although familiar with the “small nine nine ” verse, but also mastered the necessary conventional “classic ” computing rules, computing this step of the operation is often still time-consuming and cumbersome. Can be considered faster? For example, children often encounter the addition, subtraction, multiplication, division, square, open