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数学家花了1000年才得到负数的概念,又花了另外1000年才接受了负数的概念.但是,人们对于有理数的所谓接受只能算做是使用意义上的一种接受,而不是在认识上的接受.类似于人们当初对微积分的接受.负数的“教学问题”至今还没有得到圆满解决,因为现在的中学数学教科书中的有理数知识体系明显存在某些不能自圆其说之处.1.符号关系上的自相矛盾.大家知道,正、负数的意义是有理数知识体系的理论基础.正、负数的意义是什么呢?人教版《数学》七
Mathematicians took 1000 years to get the concept of negative numbers, and took another 1,000 years to accept the concept of negative numbers. However, the so-called acceptance of rational numbers can only be regarded as an acceptance in the sense of use, not in recognition Similar to what people originally accepted for calculus, and negative “teaching problems” have not been satisfactorily solved until now, there is a clear case for the rational number system in high school math textbooks that can not be justified.1 As we all know, the meaning of positive and negative numbers is the rationale for rational number knowledge system. What is the meaning of positive and negative numbers? PEP