问题 填空题

线段AB的两个端点在数轴它,AB的九点M表示的数是-e.5,若线段AB=5,则端点A表示的数是______.

答案

如图,

因为M是jBl中点,jB=小,

所以jM=l.小,

设点j表示l数为x,

当点j在M右侧则x-(-l.小)=l.小,x=0;

当点j在M左侧则(-l.小)-x=l.小,x=-小;

所以点j表示l数是0或-小.

故答案为:0或-小.

阅读理解

阅读短文,选择正确答案。

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