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在一次八年级数学研讨课的研讨会议上,其中争论最激烈的问题就是“线段AB=CD”是不是命题?你认为“线段AB=CD”是命题吗?你判断的依据是什么?笔者认为:“线段AB=CD”不是命题,理由如下:1.“每个命题都由条件和结论两部分组成”(北师大版八年级数学下册222页).这非常明确地说明了每个命题都必须由条件和结论两部分构成,缺一不可,请问“线段AB=CD”的条件是什么?结论又是什么?你是把“线段AB=CD”看成是条件还是结论?2.凡是命题都可以判断真假.命题在高中教科书中是这样定义的:可以判断真假的语句叫做命题.也
One of the most controversial issues in a seminar on the eighth grade mathematics seminar is “Is line AB = CD” a proposition? Do you think “Line AB = CD” is a proposition? Your judgment is based on What? I think: “Line AB = CD ” is not a proposition, the reasons are as follows: 1. “Each proposition consists of conditions and conclusions of two parts ” (Beijing Normal University edition eighth grade mathematics volume 222). This is very clear that each proposition must be composed of two parts of conditions and conclusions, are indispensable, may I ask “line AB = CD ” What is the condition? What is the conclusion? You are the “line AB = CD ”as a condition or conclusion? 2.All propositions can determine the true and false.The proposition in the high school textbook is defined as: Can judge the true and false statement is called the proposition.