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能称出面积的大小吗?能。这可是我的发明创造。在复习平面图形的面积时,有这样一道题:如何测算一元硬币的一个圆面的面积。问题一提出来,同学们便议论纷纷,说这还不简单,只要量出硬币的圆面直径就行。我想还有其他方法吗?不由得脱口而出:“也可以用天平称出硬币的面积来。”话
Can you tell the size of the area? This is my invention. When reviewing the area of a flat graph, there is a question: How to measure the area of a round surface of a dollar coin. As soon as the problem was raised, the students talked about each other in abundance and said it was not as simple as measuring the diameter of the round face of the coin. I think there are other ways? Unable to blurt out: “You can also use the balance out of the coin area.”