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教学内容:人教版数学教材五年级上册第五单元第79页“相遇问题”。教材分析:本节内容是学生在四年级上册学习了一个物体单向运动中的“路程、时间和速度”问题和本单元学习形如“ax±bx=c”的简易方程的基础上学习的。本节课学习的是两个物体“相向而行”中的相遇问题,主要问题模型是求相遇的时间,练习中才逐步出现求其中单个物体的速度或总路程问题。新教材中,编者重点突出借助线段图和用方程法来解决,为学生今后在解决较复杂
Teaching content: People’s Education Edition fifth grade mathematics textbook on the fifth unit p. 79 “encounter problems ”. Textbook Analysis: In this section, students learn the simple equation of “distance, time and speed” in unidirectional motion of an object and the simple equation of the unit learning form “ax ± bx = c” in the fourth grade. Based on learning. This lesson is to learn the encounter between two objects “opposite direction ”, the main problem model is to find the time of encounter, and gradually find the single object speed or total distance problem in the practice. The new textbook, the editor highlights the use of line drawings and equations to solve, the students in the future to solve the more complex