在小学算术教材里,多年来一直用“在分数里……其中一份叫做分数的单位”。“如(2/3)……(1/3)就是这个分数的单位”。由以上两句“分数的单位”所定义及引推。考试中常常出现这样的题目:“9(3/4)的单位是( ),有( )个这样的单位”。“3.07的单位是( ),有( )个这样的单位”,出题者要求填入的分别是(1/4),39,0.01以及307。在这里,我个人认为,下定义者混淆了“分数单位”与“分数 In elementary mathematics textbooks, for years we have used “in points ... one of the units called a point.” “Like (2/3) ... (1/3) is the unit of this score.” It is defined and cited by the above two units of “scores”. The exam often appeared in such a topic: “9 (3/4) of the unit is (), there are (such) units.” “The unit of 3.07 is (), there are () such units”, the questions asked by the author are (1/4), 39, 0.01, and 307 respectively. Here, I personally think that the definer is confusing the “fractional unit” with “fractional.”