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解数学题时,如事先对解法中可能产生的错误了如指掌,防患于未然,固然很好;但解出答案以后,能通过合理的检查,发现并纠正解法中的错误,也还算亡羊补牢,犹为未晚。本文拟就数学解题过程中的合理性检查方法发表一点管见。一、将所求之值代入原式验证对于计算、化简、解方程等同题,一般可将所得结果代入原式验证,以判断解答的正误,这是大家常用的一种方法。
When solving a mathematics problem, it is good to know the possible mistakes in the solution beforehand and take preventive measures. However, after solving the answers, we can find and correct the errors in the solution through reasonable inspections, and we can still make up for the problems. It’s not too late. This article proposes to express a bit of opinion on the rationality check method in mathematics problem solving process. First, the requested value into the original verification For the calculation, simplify, solve the equation equivalent problem, the general results can be substituted into the original verification to determine the correctness of the solution, which is a common method.