“乘法分配律”是北师大版四年级在探索规律学习中的一个重要的学习内容,这个内容是小学阶段运算教学重点也是教学难点。每次在进行这部分知识的教学时,总感觉这部分内容对学生来说,是一个很难理解和掌握的知识点,不少的学生不能很好的理解,学习效果欠佳,那就只好反反复复地教啊、练啊,时间是用了不少,学习效果还是不太好。这样的现象引起了我的思考:乘法分配律的学习和运用到底难在 “Multiplication Distribution Law ” is an important study content of the fourth grade of Beijing Normal University in the study of the law of exploration, this content is the focus of primary school computing teaching is also difficult to teach. Each time in the teaching of this part of the knowledge, I feel this part of the total content of the students, it is a difficult point to understand and master the knowledge that many students can not understand well, poor learning, it had better Repeatedly to teach ah, practice ah, time is spent a lot, learning is not very good. This phenomenon has aroused my thinking: the law of multiplicative distribution of learning and use in the end difficult