HMMT 二月 2000 · 团队赛 · 第 1 题

英文原题

1. Y ou are giv en a number, and round it to the nearest thousandth, round this result tonearest h undredth, and round this result to the nearest ten th. If the nal result is .7,
   what is the smallest number y ou ould have b een giv en? As is ustomary , 5's are alw a ysrounded up. Giv e the answ er as a de imal.