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解答数学问题从已知条件出发,进行正面思考,称为正面思考策略。对于平常的大多数问题,我们通常运用正面思考策略。然而有些数学题总是按照这种思维方式则比较困难,而且常常伴随有较大的运算量,有时甚至无法解决。在这种情况下,不妨打破思维常规,实行“正难则反”的策略,转化为考虑问题的相反方面,即从条件的反面或结论的反面,方法的反面去思考,往往能绝处逢生,开拓解题思路,简化运算过程。
Solving mathematical problems Starting from known conditions, positive thinking is called positive thinking. For the most common problems, we usually use positive thinking strategies. However, some math problems always follow this way of thinking is more difficult, and often accompanied by a large amount of computation, and sometimes can not be solved. Under this circumstance, we may break the conventional wisdom and implement the strategy of “being hard to resist” to translate into the opposite aspect of thinking about the problem, that is, from the negative side of the condition or the opposite side of the conclusion to the negative side of the method, Department of Health, to open up the problem-solving ideas to simplify the process of computing.