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全日制十年制学校小学课本《数学》第八册对带分数的定义是:一个整数和一个真分数合成的数,叫做带分数。我认为此定义有不妥之处。整数:包括正整数、零和负整数。在小学里学生学的整数包括零和自然数(正整数)。假如按上述定义,0和1/2合成的数是1/2,那么1/2是带分数,显然不对。给某个概念下定义,所下定义的概念的外延不能大于或小于被下定义的概念的外延。而教材中对带分数的定义犯了所下定义的概念的外延大于被下定义的
Full-time 10-year school textbooks in primary schools, “Mathematics,” Eighth Division of the definition of the score is: an integer and a real number of scores, called banding scores. I think there is something wrong with this definition. Integer: Includes positive integers, zero and negative integers. In elementary school students learn integer including zero and natural number (positive integer). If the above definition, 0 and 1/2 the number of synthesis is 1/2, then 1/2 with a fraction, obviously not. To define a concept, the definition of the concept of the extension can not be greater than or less than the definition of the concept of extension. The teaching material on the definition of the score with the definition of the concept of the extension of the definition is greater than the definition