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关于等量代换,也许你并不陌生.你听说过“曹冲称象”的故事吗?故事是这样的:有人给曹操送来一头大象,曹操想知道大象的重量,可文武百官面对这个“庞然大物”束手无策,正当大家一筹莫展之际,曹操八岁的儿子曹冲献上一计,简单巧妙地解决了这个问题.先把大象赶到一条船上,在吃水线作上标记,然后再把大象赶到岸上, 往船上装石头直到吃水线为止,这样称出船上石头的重量,就是大象的重量.曹冲用的方法就是“等量
Perhaps you are not unfamiliar with equal substitutions. Have you heard of the story of “Cao Chong called elephants?” The story is this: Someone sent an elephant to Cao Cao. Cao Cao wanted to know the weight of the elephant. The officials are helpless in dealing with this “giant thing”. When everyone is at a loss, Cao Cao, an eight-year-old son of Cao Chong, presents a simple and clever way to solve this problem. The elephant is first rushed to a boat and marked on the water line. Then Then the elephant was rushed to the shore, and the ship was loaded with stones until the waterline. So the weight of the stone on the boat was the weight of the elephant. The method used by Cao Chong was "equal