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这天,又是“数学知识半月谈”活动日,欢欢胸有成竹地等待着活动的开始,因为他早已准备好了今天的交流内容。果然,活动刚刚开始,欢欢就争着做第一个发言者。他说:“最近,我们学习了比例的基本性质,我根据这个基本性质,经过尝试,找到了一些较复杂的分数乘法问题的解答方法,今天想同大家交流一下。”说完,他拿出事先准备好的题目给大家看:学校食堂购进三种粮食共
On this day, it is also the Day of the Mathematical Knowledge, which is the beginning of the activity waiting for the start of the activity because he has already prepared the contents of today’s exchange. Sure enough, the activity has just begun, Huanhuan compete to be the first speaker. He said: “Recently, we have studied the basic nature of the ratio. Based on this basic principle, I tried some solutions to some of the more complicated problem of fractional multiplication. Today I would like to share with you.” " Take out the questions prepared in advance for everyone to see: the school canteen bought three kinds of food