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逆推还原是一种思维方法,即从事物的结果出发进行思考,沿着事物的变化追踪溯源,回到初始状态。运用逆推还原的思维方法,可以解决一些最终结果是已知的、过程是变化多端的、求初始数据的应用题。下面略举几例,供参考。例1 有甲、乙、丙三个油桶,各盛油若干千克,先将甲桶的油倒入乙、丙两桶,使各增加原有油的一倍,再将乙桶的油倒入丙、甲两桶,使它们现有的油各增加一倍,最后同样将丙桶的油倒人甲、乙两桶,这样各桶油都是16千克。问各桶原来盛油多少千克?分析与解:此题三桶最后盛油已知,都是16千克。根
Reverse push reduction is a way of thinking, that is, starting from the outcome of things to think about, follow the changes of things tracing back, back to the initial state. The use of reverse reduction of the thinking method, you can solve some of the final result is known, the process is changing, and the application of initial data. A few examples below for reference. Example 1 A, B, C three oil drums, the oil a number of kilograms, first a barrel of oil into the B, C two barrels, so that each increase in the original double the oil, and then barrels of oil down Into a, two barrels, so that they have doubled the current oil, the last oil will be the same Bingbin A, B two barrels, so each barrel of oil is 16 kg. Asked how many kilograms of oil drums? Analysis of reconciliation: This question three barrels of oil last known, are 16 kg. root