我们在教学中发现,学生在学习数学时,经常发生这样的情况:遇到一道题不知怎么解,或者虽然解出来,但方法特别繁,速度特别慢,或者老师一点拨就豁然开朗,而这层窗户纸自己却捅不破.针对这些问题,我设计了两个问题做如下调查. In our teaching, we found that when students are learning mathematics, it often happens that they do not know how to solve a problem, or if they solve it, they are particularly complicated and slow, or when the teacher dials, it suddenly becomes clear. The window paper itself is not broken. In response to these problems, I designed the following two questions to investigate.