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On the number line, 1.4 is halfway between which of the following pairs of numbe
On the number line, 1.4 is halfway between which of the following pairs of numbe
游客
2025-02-24
20
管理
问题
On the number line, 1.4 is halfway between which of the following pairs of numbers?
选项
A、-1.4 and 2.4
B、-1 and 2
C、-0.3 and 3.1
D、0. 15 and 1. 55
E、0. 4 and 1
答案
C
解析
在数轴上,1.4是下面哪一对数的中点?
解:本题的正确答案为(C)。在数轴上,若一点是另外两点的中点,则该点的坐标应是另外两点坐标的和的一半。根据这条定理,可以推出1.4是-0.3和3.1两点的中点。
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