在教学比多(少)一类简单应用题时,我着重用线段图分析数量关系,帮助学生透彻理解题意和布列算式。例如“一班43人, 比二班多5人,二班有多少人?”这个题,我抓住了以下四个问题,和学生一起画线段图。①这道题讲了几个班?②这两个班哪个班的人数多些?③题目已经告诉了哪个班的人数?④题目要求哪个班的人数?线段图一 In the teaching of more than (less) a simple application questions, I focus on the use of line segments to analyze the quantitative relationship, to help students a thorough understanding of the problem and the layout formula. For example, “a class of 43 people, five more than two classes, two classes how many people?” This question, I took the following four questions, and students drawing line drawings. ① How many classes does this subject have? ② Which classes are more in these two classes? ③ Which class has been told by the subject? ④ Which class does the subject require?