教材简析:两步应用题教学,从知识体系看,一步应用题是基础,两步应用题是关键,多步应用题是发展。学生掌握两步应用题解答过程是一次质的飞跃。因此学好两步应用题是学习简单应用题到多步应用题的过渡。可见两步应用在应用题教学中占有重要地位。学生理解掌握两步应用题难点和关键是找出题中隐蔽的“中间问题”,所以教学过程中,要突出“中间问题”,还要适当穿插结构训练,移变“中间问题”。 Teaching material analysis: two-step teaching of application problems, from the knowledge system, one-step application is the foundation, two-step application is the key issue, multi-step application is development. Students master the two-step application questions answer process is a qualitative leap. Therefore, learning a good two-step application of the problem is to learn a simple application of multi-step application to the title of the transition. Visible two-step application in the application of teaching occupies an important position. Students understand the difficulty and key to grasp the two-step application is to find out the hidden “intermediate problem”, so the process of teaching, to highlight the “middle problem”, but also appropriate interspersed structural training, shift the “intermediate problem.”