prep 数学题2

kun861010

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
这道题目什么意思啊？什么叫500是100和接近x的倍数？那x不是就是5吗？真没看懂。

genius_fang

就是说500是100的倍数中最接近X的~也就是x在450至549指间~