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一、教材分析两步计算应用题是小学数学教材中的重要内容之一。掌握好这部分知识对学好小学应用题起着至关重要的作用。本节课是在学生已经学会解答连续两问应用题和有三个已知条件的加、减两步应用题的基础上进行教学的。根据知识间的内在联系,从知识的整体结构出发,通过对原有已掌握的简单应用题的深化认识,在以抓数量关系的发展为主线,以认识两步题结构为切入点,以培养发展学生分析能力为核心目标的思想指导下设计本教案。根据大纲的要求和对教材的理解,确定本节课的教学目标为:
First, the textbook analysis Two-step calculation of application questions is an important part of primary school mathematics textbooks. Mastering this part of the knowledge plays an important role in learning the application of primary school. This lesson is based on the student's experience of answering two consecutive question questions and three plus or minus two-step questions with three known conditions. According to the intrinsic relations among knowledge, starting from the overall structure of knowledge, through the deepening understanding of the simple mastered problems, taking the development of quantitative relationship as the main line, taking the understanding of the two-step structure as the starting point to cultivate The development of student analytical skills as the core goal of thinking under the guidance of the design of the lesson plans. According to the outline of the requirements and understanding of the teaching materials to determine the teaching objectives of this lesson: