“简单的加减法实际问题(1)”是苏教版二年级上册“100以内的加法和减法(三)”单元的内容,主要是在学生已经学过“求一个数比另一个数多(少)几”的实际问题的基础上,教学“通过不同方法使两个数量同样多”的实际问题。这是修订教材新增加的教学内容,由于问题的结构比较开放,解题方法灵活多样,教学时存在或片面追求方法开放,或难以抓住问题本质 “Simple addition and subtraction of practical problems (1) ” is the second edition of the Soviet version of the upper “100 less than the addition and subtraction (three) ” unit content, mainly in the students have learned On the basis of the actual problems of more (less) few “than the other, teaching” the same number of two by different means ". This is a newly added teaching content of the revised textbook. Since the structure of the question is relatively open and the methods for solving problems are flexible and diverse, there is or is one-sided pursuit of teaching methods that are open or hard to grasp the essence of the problem