《数学课程标准》指出:有效的数学学习活动不能单纯地依赖模仿记忆,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。数学学习离不开个体的体验,学生需要在动手实践,自主探索,合作交流中体验学习,在体验中思考创造,有利 According to “Mathematics Curriculum Standard”, it is pointed out that effective mathematics learning activities can not rely solely on imitation of memories, hands-on practice, independent exploration and cooperation and exchange, which are important ways for students to learn mathematics. Mathematics learning is inseparable from the individual experience, students need hands-on practice, self-exploration, cooperation and exchange experience learning, thinking in the experience of creation, favorable