“数与计算”是数学教学的一个重要领域,一位教师执教新世纪版四年级下册的《精打细算——小数除以整数》,在“课始的情境处理、课中的算法建构、课末的练习设计”三个环节出现的问题,引发我重新审视计算教学。现谨从问题切入,谈谈我的思考。一、对待情境,意要会,不可一弃了之教学片段1直接出示两条信息“甲商店牛奶11.5元买5包,每包多少钱?乙商店牛奶12.9元买6包,每包多少钱?”学生口头列式,教师板书。师:“观察这 Number and Computation is an important area of ​​mathematics teaching. A teacher coaches the New Year Book of Grade 4, ”Counting - Dividing Decimals into Integers,“ deals with situations in the beginning of the lesson, algorithms in the lesson Construction, the end of the class practice design ”The three aspects of the problem, led me to re-examine the calculation of teaching. Now I am going into the question and talking about my thinking. First, the treatment of the situation, the intention will be a piece of education can not be discarded 1 direct presentation of two messages “A shop milk 11.5 yuan to buy 5 bags, how much each package? B milk 12.9 yuan to buy 6 bags per pack how much Money? ”Student verbal list, teacher blackboard. Teacher: "Look at this