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。由于学生所处的文化环境、家庭背景和自身思维方式的不同,学生的数学学习活动应当是一个生动活泼的、主动的和富有个性的过程。在实施自主、探索、合作的教学方式和学习方式的同时,通过有目的有计划地训练学生的数学语言,培养学生和发展学生的数学语言表达能力、推理能力、概括能力等数学能力 Mathematical curriculum standards that: 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. Due to the different cultural environment, family background and ways of thinking, the students’ learning activities should be a lively, active and individualized process. While carrying out autonomous, exploratory and cooperative teaching methods and learning styles, students are trained in purposeful and systematic training of their mathematical language to develop students’ mathematical abilities, such as mathematical language expression ability, reasoning ability and summarizing ability