p417 12Five different points A,B,C,D and E lie on a line in that order.The length of AD is 4.5 and the length of BE is 3.5.If the length of CD is 2,what is one possible value for the length of BC?

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p417 12Five different points A,B,C,D and E lie on a line in that order.The length of AD is 4.5 and the length of BE is 3.5.If the length of CD is 2,what is one possible value for the length of BC?
p417 12
Five different points A,B,C,D and E lie on a line in that order.The length of AD is 4.5 and the length of BE is 3.5.If the length of CD is 2,what is one possible value for the length of BC?

0.5

BC的结果可以是1

题意是：一条直线上有ABCDE5个点，AD=4.5，BE=3.5，如果CD=2，那么BC=？
根据这些条件是没有办法求出bc的，我也翻译了，你自己试着求一下。
根据条件可以得到AB+BC=2.5
BC+DE=1.5 很明显少了一个条件

俺不会

AD=4.5，BE=3.5，CD=2，
So AB+BC=2.5,BC+DE=1.5,AB-DE=1，
BC=0.5，AB=2,DE=1
So The length of BC is 0.5

0 to 1.5

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