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外语
On the number line above, what number corresponds to a point that is 2/5 of the distance from 10 to 40 ?
On the number line above, what number corresponds to a point that is 2/5 of the distance from 10 to 40 ?
admin
2009-05-19
54
问题
On the number line above, what number corresponds to a point that is 2/5 of the distance from 10 to 40 ?
选项
A、6
B、8
C、12
D、15
E、22
答案
E
解析
在左面的数轴上,哪一个数字所对应的点是10与40之间距离的2/5?
解:本题的正确答案是(E)。大多数的考生容易误选(C)选项,但该题是问哪一点的坐标把10与40之间的距离分成2/5和3/5两段,所以计算未知点的坐标应当从10开始,即为(10+30)×2/5=22。
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