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初一数学的学习将给同学们带来崭新的一页,特别是负数的引入,更是激起同学们对数学学习的无限遐想.今天就和同学们一起来认识这位新朋友——负数.一、负数在中国的发展经历据史料记载,早在两千多年前,中国就有了正负数的概念,掌握了正负数的运算法则.1.最早的负数定义三国时期著名数学家刘徽在负数概念的建立上贡献最大.刘徽第一次给出了正负数的定义,他说:“今两算得失相反,要令正负以名之.”意思就是说,在计算过程中遇到具有相反意义的量,
The first maths learning will bring a brand new page to students, especially the introduction of negative numbers, but also inspire students unlimited reverie of math learning today and classmates together to know the new friend - the negative First, the development of negative numbers in China According to historical records, as early as two thousand years ago, China had the concept of positive and negative, mastered the algorithm of positive and negative.1 The earliest negative definition of the famous mathematics Liu Hui contributed most to the concept of negative numbers. For the first time, Liu Hui gave the definition of positive and negative numbers. He said: " , Encountered in the calculation of the amount of the opposite sense,