新人教版数学五年级下册第二单元:“因数和倍数”中,这一节内容与原来老教材比较有了很大的改动,老教材中先是建立整除的概念,用a÷b=c表示a能被b整除,在此基础上认识因数和倍数;而现在的人教版教材是在未认识整除的情况下认识因数和倍数的,用a×b=c直接引出因数和倍数的概念。我认为在教学这节课时,必须体现以学生为主体,必须让学生探究发现提供足够的时空和适当的指导,必须提高课堂教学的 New PEP mathematics fifth grade second volume of the second unit: “factor and multiple ”, the content of this section compared with the original old text has been greatly changed, the old textbook is the first to establish the concept of divisibility, with a ÷ b = c that a can be divisible by b, on the basis of understanding of factors and multiples; and now the PEP textbook is recognized in the case of divisibility without knowing the factors and multiples, with a × b = c leads directly to the factor and Multiple concept. I think in the teaching of this class, we must reflect the students as the main body, we must allow students to explore the discovery of adequate space and time to provide appropriate guidance, we must improve classroom teaching