在批林批孔运动深入开展的大好形势下,遵照毛主席“教育要革命”的伟大指示,最近我们到兰州三十二中搞教育革命实践课的试点。通过“有理数”一章的教学实践,对于如何运用对立统一规律来阐明正负数概念的引入,有一些肤浅的体会,写出来供大家讨论。我国是最早认识负数的国家。早在两千一百多年前已有正数、负数和零的加减法则,十三世纪(距今700多年前)时,已有关于正负数乘法法则的记载。在欧洲迟至十七世纪(距今 Under the great situation of carrying out the proletarian and baryhistoric campaigns in depth, following the great instruction of Chairman Mao’s “education for revolution”, we recently came to Lanzhou to run a pilot program of educational and revolutionary practice. Through the teaching of “rational numbers” chapter, there are some superficial understandings on how to use the law of opposites to clarify the introduction of the concept of positive and negative numbers and write them out for discussion. Our country is the earliest country to recognize negative numbers. As early as 2,100 years ago, there were positive and negative and zero addition and subtraction rules. In the thirteenth century (more than 700 years ago), there were records of multiplication rules of positive and negative numbers. As late as the seventeenth century in Europe (since