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【教学内容】什么是面积呢?2011版新教材中取消了原来“物体的表面或封闭图形的大小就是它们的面积”的定义,取而代之的是“某件物品表面的大小就是某件物品表面的面积”这样的描述,这里的“大小”不是有的大、有的小“相差”的意思,而是“每个面各有确定的大小”的意思。面的大小可以通过测量得到,测量是将一个待测的量和一个公认的标准量进行比较的过程,这个标准量就是“面积单
【Content】 What is the area? 2011 version of the new textbook to cancel the original ”the size of the object’s surface or enclosed graphics is their area “ definition, replaced by ”the size of an object surface is a The size of the surface of the item “This description, ” size “here is not the meaning of some big, some small ” difference “, but ” each face has a certain size “means. The size of the face can be measured by measuring the amount of a test to be compared to a recognized standard amount of ”