If 500 is the multiple 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<500
(2) y<400作者: sumerlaws 时间: 2011-1-8 21:18
应该是E吧
因为500是离x最近的100的倍数,那么450<x<550,同理350<y<450
so, 800<x+y<1000