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执教四年级下册“乘法分配律”时,学生即使理解了,也难以用自己的语言进行表述。那么怎样才能把抽象的概念具体并简单化?怎样才能让学生“会说”呢?在解决实际问题中,初步感知乘法分配律的“分”与“配”再难理解的概念,只要把它还原到学生的生活问题当中,他们都会以饱满的热情积极参与进来。在上课之前,创设学生喜欢的“运动会场景”。学生根据情境图里的数学信息,可以很自然地提出“运动员的服装一共要付多少元”的问题,然后通过交流,
Coaching the fourth grade under the book “multiplication assignment ”, even if students understand, it is difficult to use their own language to express. How can we make the concept of abstraction concrete and simplified? How can we let students “say”? In the solution of practical problems, the initial perception of multiplication distribution law “points ” and “match ” difficult to understand The concept, as long as it is restored to the student life issues, they will be actively involved with full enthusiasm. Before class, create a “sports scene” that students like. Students according to the situation in the map of the mathematical information, it is natural to ask “how much the athlete’s clothing to pay,” the problem, and then through the exchange,