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1.问题引入同学们知道“鸡兔同笼”这个问题吗,它出自哪里,什么意思?“鸡兔同笼”问题是我国古代趣题之一,出自《孙子算经》:“今有雉兔同笼.上有三十五头,下有九十四足。同雉兔各几何?”意思是说“现有若干只鸡和兔放在同一个笼子里,从上面看,。有35个头;从下面看,有94只脚。问笼子里有几只鸡?几只兔?”。2.对问题的初步认识问题1在小学我们学过这个同题,你还能用四则运算的方法解答这
1. Question introduction Students know that “chicken rabbit with the cage,” this question, where it comes from, what does it mean? “Chicken rabbit with the cage” is one of the ancient topics of interest in our country, “There are pheasant rabbits with cage. There are thirty-five, there are ninety-four feet. With the same geometry of the pheasant?” “It means that ” There are a number of chickens and rabbits in the same cage, From the top, there are 35 heads and 94 feet from the bottom, asking how many chickens in the cage? 2. Preliminary understanding of the problem Problem 1 In primary we have learned this same question, you can still use the four operations method to answer this