我国著名数学家华罗庚曾经说过:“善于退,足够地退,退到最原始而又不失去重要性的地方,是学好数学的一个重要的诀窍。”下面通过一个例子与同学们一同欣赏这一至理名言,领悟名言背后蕴藏的解题方法。长方形纸板内有2003个点,连同长方形的顶点共有2007个点。在这2007个点中,任何3点都不在同一条直线上。现将长方形全部剪成三角形,三角形 Hua Luogeng, a famous mathematician in our country, once said: “Being good at retreat, retreating enough to retreat to the most primitive place without losing importance is an important knack for learning math.” The following is an example of working with students Appreciate this wisdom, understand behind the famous solution to the problem-solving methods. There are 2003 points in the rectangular cardboard, with a total of 2007 points of the vertices of the rectangle. Of these 2007 points, none of the 3 points are on the same straight line. Now the whole rectangle cut into triangles, triangles