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有些问题若按常规法求解比较麻烦,这时可将问题看作一个整体,这样解题效果特好.这种解决问题的方法就叫做整体思维法.例:有甲、乙、丙三人,甲乙两人的体重之和是98.5千克,乙丙两人的体重之和为112.5千克,甲丙两人的体重之和为111千克,求三人的体重各是多少?思路分析一:如果要先求出甲的体重,必须先消去乙和丙的体重,如
If some problems are more difficult to solve according to the conventional method, then the problem can be regarded as a whole, so that the effect of solving the problem is particularly good. This method of solving the problem is called the overall thinking method. Example: There are three persons: A, B, and C. The sum of the weights of A and B is 98.5 kg, the sum of the weights of both E and B is 112.5 kg, and the total weight of A and B is 111 kg. What is the weight of each of the three persons? To find the weight of A, you must first eliminate the weight of B and C, such as