教学是一门科学，又是一门艺术．在数学教学活动中，要求教师以富有审美价值的独特的方式方法，创造性地组织教学，使教与学双边活动协调进行．叶圣陶先生曾说过：教师的作用“不在于全盘授予，而在于相机诱导，必令学生运其才智，勤其练习，领悟之源广开，纯熟之功弥深”．由 Teaching is a science and an art. In mathematics teaching activities, teachers are required to organize teaching in a unique way with aesthetic value and to coordinate teaching and learning bilateral activities. Mr. Ye Shengtao once said: The role of the teacher “is not to grant the whole thing, but to induce the camera, students will be able to use their talents, diligence in their practice, the source of comprehension, and deep skill.” by