HMMT 二月 2000 · 团队赛 · 第 1 题
HMMT February 2000 — Team Round — Problem 1
题目详情
- Y ou are giv en a n um b er, and round it to the nearest thousandth, round this result to nearest h undredth, and round this result to the nearest ten th. If the nal result is .7, what is the smallest n um b er y ou ould ha v e b een giv en? As is ustomary , 5's are alw a ys rounded up. Giv e the answ er as a de imal.
解析
- .6445 rounds to .645 to .65 to .7. Otherwise .6444... rounds to .644. So the smallest n um b er is .6445 .