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在五年级第二单元数学质量监测上出现了这样一题:在长方体的展开图中,分别用“上”、“下”、“前”、“后”、“左”、“右”标明6个面。老师们出现了三种解答意见,第一种:直观感知相邻三个面的大小关系,结合展开图解答为图1;第二种:根据生活拍照经验,认为这个长方体的“上面”看似面积比“前面”小,实际面积有可能比“前面”大,并提供了两张从不同位置拍摄同一长方体对象的照片作为例
In the fifth grade of the second unit of mathematical quality monitoring on the emergence of such a problem: the cuboid in the expansion of the figure, respectively, with “” on “,” “under”, “before”, “after” “Left”, “Right” indicate 6 faces. The teacher appeared three kinds of answers to comments, the first: intuitive perception of the size of the relationship between the three adjacent surfaces, combined with the expansion diagram of the answer to Figure 1; The second: According to life experience, that the rectangular “” The apparent area is smaller than “front”, the actual area may be larger than “front”, and two photographs of the same cuboid object taken from different locations are provided as an example