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我的孩子在报上看到一个智能试题:九根火柴可以组成多少个等边三角形?他在桌面上拨弄着火柴,摆来摆去都没有成功。当我示意可以搭成立体的七个等边三角形时,他恍然大悟,说:“原来是这样!”过后,我想小学生习惯于从平面上考虑问题,空间观念不强,才把这个简单的题目当作了难题。而我只匆匆告诉了答案,没有因势利导把他的思维从平面引向立体空间,真是坐失良机。从平面到立体,这是人的思维发展阶段上的飞跃。人类对自然界、对社会的认识,就是不断从平面向立体空间深化的。从
My child saw a smart question in the newspaper: How many equilateral triangles could nine matches make? He fiddled with matches on the table and did not succeed. When I gestured to form a three-dimensional three equilateral triangles, he suddenly realized, saying: “So it is!” After that, I think primary school students are accustomed to consider the problem from the plane, the concept of space is not strong, just put this simple topic As a problem. And I only hurriedly told the answer, there is no defensive guide his mind from the plane to the three-dimensional space, really missed opportunities. From plane to three-dimensional, this is a human leap in the stage of thinking and development. Human understanding of nature and society is constantly deepening from the plane to the three-dimensional space. From