《数学课程标准(实验稿)》指出:“有效的学习活动不能单纯地依赖模仿与记忆,动手实践、自主探索与合作交流是学生学习数学的重要方式”。因此,数学教学必须为学生创造自主学习、自主活动、自主发展的条件,让学生积极主动地参与教学的全过程,使每个学生都能在原有的基础上得到发 “Mathematics Curriculum Standard (experimental draft)” pointed out: “Effective learning activities can not simply rely on imitation and memory, hands-on practice, independent exploration and cooperation and exchange is an important way for students to learn mathematics.” Therefore, mathematics teaching must create the conditions for students to learn independently, independently and independently, so that students can actively participate in the whole process of teaching so that each student can get the original