一、处理好“特殊与一般”的关系计算教学大多是从具体的事例引出,进而将特殊情况下的结论推广至一般,这其中重要的方法之一就是要加强比较,以使结论适用于普遍。要借助例题这一特例理清算法,进而分析其所蕴涵算理,推广至一类。如在教学“分数除法”时,一辆汽车25小时行30km,这辆汽车平均每小时行多少千米?开始,学生很快就用五年 First, deal with “special and general ” relational computing teaching are mostly derived from the specific examples, and then generalize the conclusion in special cases, one of the important methods is to strengthen the comparison in order to make the conclusion applicable In general. To take advantage of the special case of this example to clarify the algorithm, and then analyze its implication of the theory, extended to a class. Such as teaching “score division ”, a car 25 hours line 30km, the average number of kilometers per hour this car? At the beginning, students will soon use five years