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在《小学教学基础理论与教法》第一册第四章中有这样一道习题:试确定32.5(±3)的有效数字(见课本P.235)。这是一道由绝对误差界确定近似数的有效数字的问题。对于有效数字,课本上是这样定义的:“一个近似数中,从左面第一个非零的数字起到右边按四舍五入法所截得的最后一个数字止,所有数字均叫做这个近似数的有效数字。”根据这个定义,上述
In Chapter 4 of Book 1 of “Basic Theory and Pedagogic Principles of Primary School Teaching,” there is an exercise in which we try to determine the significant figure of 32.5 (± 3) (see textbook P.235). This is a question of determining the effective number of approximations by the absolute error community. For valid numbers, the textbook is defined as: “In an approximation, the number from the first non-zero on the left-hand side of the right-hand rounding method until the last number, all numbers are called the approximate number of valid Number. ”According to this definition, the above