苏博士开了一个数学培训班,培训开始的第一天,苏博士就带领同学们乘船去三峡。苏博士问同学们:“与水流方向相对比,现在船行驶的方向怎么说?”大家齐声回答:“是逆向行驶。”苏博士说:“对,解决问题也相似,既有顺向推理,也有逆向推理。”玲玲问:“什么是逆向推理?”苏博士解释说:“逆向推理,就是从应用题最后得出的结果出发一步一步向前推理,直到问题解决。请同学 Dr. Su opened a math course. On the first day of training, Dr. Su led the students to take a boat trip to the Three Gorges. Dr. Su asked the students: ”Compared with the direction of the current, the direction of the ship now how to say? “ We all answer: ”is the reverse. “ Dr Su said: ”Yes, to solve the problem is similar, There are both forward reasoning, but also reverse reasoning. “Lingling asked: ” What is reverse reasoning? “Dr. Su explained: ” reverse reasoning, that is, from the application of the final results of the problem step by step forward reasoning, Until the problem is solved, please classmates