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倍数应用题历来是低年级应用题教学的一个难点,以往的教学,把倍数关系的三类问题割裂开来,孤立地教一类练一类,致使学生在相当长的一段时间内难以形成较完整的认识,表现在解题中最常见的错误就是见“倍”就乘。针对这些问题,义务教育小学数学教材第三册对这部分内容做了较大的改进,把三类问题相对靠拢,并加强了动手操作和及时的对比,为突破这一教学难点开辟了新的途径。通过几届先行班的教学实践,积累了一些教学经验,现将其中几项教学措施简介如下,以供大家借鉴。 一、应用直观,帮助学生建立“倍”的概念
Multiplication application problems has always been a difficult problem in the lower grades teaching. In the past, teaching separated the three types of problems with multiple relations and taught them one by one in isolation, which made it difficult for students to form a comparatively long period of time Complete understanding of the performance of the most common mistakes in solving problems is to see “times” to multiply. In response to these problems, the third volume of compulsory education in primary school mathematics textbooks made great improvements to this part of the content, relatively close the three types of questions, and to strengthen the hands-on operation and timely comparison, to break through the teaching difficulties opened up a new way. Through several first-class teaching practice, has accumulated some teaching experience, now several of the teaching measures are summarized below, for your reference. First, the application of intuitive, to help students establish the “times” concept