一、数形结合法【点拨】“数形结合”可以促进学生形象思维与抽象思维的协同发展,是一种很好的解决问题的策略。数形结合通常采用画图的方法,用直观的图形表示数量之间的关系。例1.小明看一本书,第一周读了它的23,第二周读了余下的25,第三周读完。已知第三 First, the combination of digital form 【Dianpian】 “combination of numbers” can promote the synergetic development of students’ image thinking and abstract thinking, is a good strategy to solve the problem. The combination of figures usually adopts the method of drawing, and the relationship between the numbers is expressed by an intuitive figure. Example 1. Xiao Ming read a book, read it in the first week of 23, read the remaining 25 in the second week, the third week of reading. Known third