近期,我在县内的两次数学教学研讨活动中,听到了关于“时间、路程、速度”的研讨课。这是四年级上册第三单元“三位数乘两位数”笔算乘法后的教学内容,充分体现了新教材的一个特点——计算与解决问题紧密结合。这是四年级解决问题教学中的重点课、难点课,关于此课“教材如何处理”“重点如何把握”“三者数量关系的解决”等等问题一直困扰着我们许多老师。从这两次听到的同一教学内容中,笔者发现了许多异曲同工之处,也发现了一些现象,于是,笔者结合自己的教学实践,提出一些不成熟的思考。 Recently, I heard two seminars on “Time, Distance, Speed” in two math teaching seminars in the prefecture. This is the fourth grade on the third unit “three digits by two digits ” pen calculation multiplication teaching content, fully embodies a new teaching material characteristics - calculation and solve the problem closely. This is the fourth grade problem-solving teaching of the key courses, difficult courses, on this lesson “textbook how to deal with ” “focus on how to grasp ” “the relationship between the three ” and so on have been plagued many of us teacher. From these two times I heard the same teaching content, I found many similarities and differences, but also found some phenomena, so I combined my own teaching practice, put forward some immature thoughts.