一天,我班的几个学生先后到办公室问我同一道课外习题:一桶油,连桶一共重80千克,用去半桶油后,连桶称得还剩45千克,求桶重多少千克?我乍一看题,就觉得它有点“趣题”的味道,而且又正与我班当前的教学内容相吻合,值得向全班学生介绍和推广解答方法,打定主意抽出时间让学生集体练一练。于是 One day, several students in my class went to the office one after another to ask me the same extra-curricular exercise: a barrel of oil, even a total weight of 80 kg, with half a barrel of oil, even the barrel weighs 45 kg, how many kg At first glance, I found it a little “interesting”, and it is now in line with the current teaching content of my class. It is worth introducing and promoting solutions to the entire class, setting out the idea of ​​taking time out Students practice a collective practice. then