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读了李志军的《构造长方形再解数学题》(《中小学数学》小学版2012年第1-2期),受益匪浅。我对文中的数学题也产生了浓厚的兴趣,并进行了深入的探究,考虑了小学生的年龄特点,根据题中数据,展开联想,找到了学生更易接受和理解的方法。现提出来与大家交流。题目一艘轮船从甲港顺水行到乙港,立即逆水返航到甲港,共用8小时。已知轮船顺水速度比逆水速度每小时快20千米,又知前4小时比后4小时多航
Li Zhijun read “Construct a rectangular solution mathematics problem” (“primary and secondary mathematics” primary version 2012 1-2) benefit. I also had a keen interest in the maths in the essay. I also conducted in-depth research and considered the age characteristics of the pupils. Based on the data in the essay, I started associating and found ways to make students more receptive and understanding. Now put forward to communicate with you. Title A ship from Port A to B port water, immediately turn against the water return to Port A, shared 8 hours. It is known that the speed of the ship along the water is 20 km faster than the speed of the counter-water and that the first 4 hours is more than the 4 hours afterwards