有个小学数学教师问道:不少书中把百分数定义为:“分母是100的分数叫做百分数”,这个定义简明易懂,为什么小学教材中却定义为:“表示一个数是另一个数的百分之几的数,叫做百分数”呢? 这是因为分数既可以用来表示具体的量(如一段花布1/2丈),也可以用来表示两个数量的倍比关系(如花布的长是白布的1/2)。百分数在生产、生活和科学研究中的广 A primary school mathematics teacher asks: In many books, the percentage is defined as: “The denominator is a fraction of 100 called a percentage.” This definition is concise and easy to understand. Why primary school textbooks are defined as: "a number is another number This is because the score can be used to represent a specific amount (such as a section of cloth 1/2 inch), it can also be used to represent the ratio between the two quantities (such as cloth The length is white cloth 1/2). The percentage is wide in production, living and scientific research