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引子:一道错误率居高不下的数学问题教学中,相信不少老师都曾讲过类似这样的简单问题:汽车行100千米需要25升汽油,平均行1千米需
Primer: a high error rate in the teaching of mathematical problems, I believe many teachers have talked about such a simple question: 100 km car line requires 25 liters of gasoline, the average line 1 km