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有一些求面积的应用题,从条件直接入手,往往难以求解。而我们必须用逆向思维的方法,找出条件中的某种隐含的条件,求出所需要的量,以达到解题的目的。例:有一个占地100平方米的正方形街心花园,由于街道规划,花园的边长各增加5米,规划后花园的面积增加多少平方米?分析:根据题意,要求“花园面积增加多少平方米?”就要求出增加后的面积
There are some applications for the area, starting directly from the conditions are often difficult to solve. And we must use the method of reverse thinking to find out some of the conditions of the implied conditions, find the amount needed in order to achieve the purpose of solving problems. Example: There is a 100 square meter square street heart garden, due to street planning, the garden side length of each increase of 5 meters, after the planning of the garden area increased by how many square meters? Analysis: According to the title, asked “increase the number of garden area Square meters? ”Ask for an increase of the area