[雑学] 0.999…2007/02/052008/02/28ReBlogWikipedia,雑学0.999… – Wikipedia (Wikipedia) 情報源:はてぶ この無駄に詳しく学術的なのがWikipediaの醍醐味だよねｗ ReBlogWikipedia,雑学Posted by 兼乃