数学是人们生活、劳动和学习中不可缺少的工具。数学,来源于生活,又服务于生活。《义务教育数学课程标准(实验稿)》明确提出,学生的数学学习内容应当是现实的、有意义的,要有利于学生主动地进行观察、实验、猜测、验证、推理与交流。内容的呈现应采用不同的形式,以满足多样化的学习需求。数学学习不能仅仅依赖模仿与记忆,动手实践、 Mathematics is an indispensable tool in people’s life, work and study. Mathematics, from life, but also serve life. “Compulsory education mathematics curriculum standards (experimental draft)” made it clear that students should be realistic and meaningful mathematical learning content, to help students take the initiative to observe, experiment, guess, verify, reasoning and exchange. Content should be presented in different forms to meet diverse learning needs. Mathematics learning can not rely solely on imitation and memory, hands-on practice,