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一般行程类应用题的解决都是按照行程的先后顺序或列表分析,或画线段图分析,但有些题目因数量关系复杂,利用“倒带”原理解决起来更加简捷。所谓“倒带”就是把行程问题中的研究对象由终点向起点进行逆向运动,犹如电影播放中的倒带模式,从中获取更多的题目信息,进而解决应
General travel class application questions are resolved in accordance with the order of the trip or list analysis, or draw line segment analysis, but some problems due to the complexity of the number of relations, the use of “rewind ” principle to solve more simple. The so-called “rewind ” is the study of the travel problem from the end point to the starting point for reverse movement, like the film playback rewind mode, get more subject information, and then should be resolved