ken老师你好,这道题目我的思路是设97、98、99依次为a、b、c,根据题目得出b=C+y; b=a+x。条件1)x>y,可以得出a<c。 第二个条件不太懂。而且这道题目的开始的的less、 more in 1999,这些术语我转化成公式就浪费了半个小时,想问老师有没有更高效的解决办法?
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ken@boost.org.cn
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If 500 is the mutiple of 100 that is closest to x and 400 is the multiple of 100 that is closest to y,which multiple of 100 is closest to x+y? (1)x小于500 (2)y小于400