一些农村地区，特别是经济落后的地区，差生过多是一个突出的教育问题，其原因之一就是一些中学生学习兴趣不浓，其中相当一部分学生数学学习兴趣不高，以致造成一些中学生中途退学，不能保证普及九年义务教育的顺利开展．为了提高学生数学学习兴趣，培养学生运算能力，北京市 In some rural areas, especially in economically backward areas, excessive student education is an outstanding education problem. One of the reasons is that some middle school students have little interest in learning. A considerable number of students have low interest in mathematics learning, which has caused some middle school students to drop out of school. Can not guarantee the smooth development of universal nine-year compulsory education. In order to improve students’ interest in mathematics learning and develop students’ computing ability, Beijing Municipality