《数学课程标准》中指出:“有效的数学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。”给学生提供充分的参与数学活动的时间和空间,使学生在认真听讲、课堂练习的同时,有更多的机会在实践中探索,在合作中交流,从而提高数学课堂教学的效率,真正实现数学学习方式的转变,使学生成为学习的主人。 According to “Mathematics Curriculum Standard”: “Effective mathematics learning activities can not rely solely on imitation and memory, hands-on practice, independent exploration and cooperation and exchange is an important way for students to learn mathematics.” "To provide students with adequate participation in mathematical activities Time and space, so that students listen carefully in class practice, at the same time, have more opportunities to explore in practice, cooperation in the exchange, so as to improve the efficiency of mathematics classroom teaching, the real change in the way of learning mathematics, so that students become learning The owner.