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三年级数学上册安排了分数的初步认识、简单的分数大小比较、简单的分数加减法.其中分数的概念对三年级小学生来说是比较抽象、不易理解的数学概念.造成这一现象的原因,一方面是分数概念本身不像整数概念那样直观易懂,另一方面是有些老师对分数的内涵和意义理解得不够清晰,甚至出现一些错误的理解.因此如何有效地突破这个教学难点,是非常值得研究与探讨的.一、让学生在具体情境中动手操作,逐步感悟和完善分数的意义平均分是分数产生的基础,在教学实践中经常发现学生在叙述分数的意义时漏掉“平均”这个关键字.教学时利用情境图,让学生结合具体的情境说说怎样公平地分一分野炊时
The third grade mathematics book arranged a preliminary understanding of the scores, a simple comparison of the score size, simple score addition and subtraction method. The concept of scores for third grade pupils is more abstract, difficult to understand mathematical concepts. Cause of this phenomenon On the one hand, the concept of scores itself is not as intuitive and intelligible as the concept of integers, on the other hand, some teachers do not understand the meaning and meaning of scores clearly enough, and even some misunderstandings appear. Therefore, how to effectively break through this teaching difficulty is It is worth to study and explore.First, let the students in the concrete situation hands-on operation, and gradually realize and improve the meaning of the score average score is the basis of the score, often found in the teaching practice of students in the meaning of the description of the missing “ Average. ”Teaching situations using the situation map, so that students with specific situations to talk about how to share a fair share of cooking time