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在网络上常常看到一些似是而非的数学题,有的读者会觉得很神奇,不断转发;有的读者觉得其中定有玄机,但苦于无法揭秘;还有的读者会一探究竟,弄个水落石出。我属于第三类读者。作为一名数学教师,我想用掌握的数学知识去拨开云雾辨真伪。如果连数学教师也跟着瞎起哄,那是对我们自己专业的亵渎。【例1】“1元=1分”。网上流传这样的推论:1元=10分×10分=0.1元×0.1元=0.01元=1分。用该等式说明1元=1分,借指现在的
Some often see specious math problems on the Internet, some readers will find it amazing, constantly forward; Some readers think there is a mystery, but suffer from uncovering secrets; And some readers will find out, get it. I belong to the third type of reader. As a math teacher, I would like to use the mastery of mathematics to clear the clouds and tell the truth. If even mathematics teachers follow blindly to coax, it is our own professional profane. [Example 1] “1 yuan = 1 minute ”. Circulated on the Internet such inference: 1 yuan = 10 points × 10 points = 0.1 yuan × 0.1 yuan = 0.01 yuan = 1 point. Use the equation to explain 1 yuan = 1 point, by means of the present