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人教版数学五年级上册第87页第7题是:“把一个三角形分成四个面积相等的三角形,可以怎样分?你能想出几种方法?”这是一道开放性习题,对该题的解法作如下探究:
PEP Teaching materialPhysicalEnglish Fifth grade Page 87 The seventh question is: “A triangle divided into four triangles of equal area, how can we divide? Can you come up with several ways?” "This is an open exercise, The solution to the problem as follows: