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根据知识内在联系,分段安排练习,可让学生自己发现归一问题的解题规律。第一段,“求单一量练习”。习题:①学校花132元买椅12把,平均每把多少元?②一辆汽车4小时行160公里,平均每小时行多少公里?③一台织布机四月份(30天)共织布2850米,平均每天织布多少米?……学生口答后问:第一题要我们求什么?第二题呢?……然后指出:这些题都是要我们求每一份的数量,就是求“单一量”。边问边讲,边出示
According to the internal relations of knowledge, sub-arranged exercises, allowing students to discover the problem of solving the problem of solving the law. The first paragraph, “seeking a single amount of practice.” Exercises: ① school spent 132 yuan to buy 12 chairs, an average of how many? ② a car 4 hours 160 kilometers, an average of how many kilometers per hour? ③ a loom in April (30 days) were woven 2850 meters, the average number of meters per day weaving? ... Students answer after the Q: The first question to ask what? The second question? ... And then pointed out: These questions are for us to ask the number of each is seeking “Single amount.” While asking to speak, while showing