“相遇问题”是小学数学中较复杂的应用题.为使学生顺利地理解和掌握这种题目的解法,可设计一节准备课.教法如下:一、增强感性认识“相遇问题”中有一些比较抽象的名词术语.在准备课教学中,通过让学生自己表演、观察,增强他们的感性知识,从中扫除学生的学习障碍,是很有必要的.因此,在上课开始时,教师可叫两名步长 “Encounter problems ” is a more complex application in elementary mathematics .In order to enable students to successfully understand and master the solution to this problem, you can design a preparatory lesson .As follows: First, to enhance perceptual knowledge “encounter ”There are some more abstract terms in the preparatory course teaching, by allowing students to perform their own observations, enhance their perceptual knowledge, to remove the learning disabilities of students is necessary, therefore, at the beginning of class Teachers can call two steps