1+19+9999+99999999999 99999999999999999999999+99999999×0＝

9999999999＋999999999＋99999999＋99999＋9999＋999＋99＋9＝? 99999999999 1+2+3+.+9999+10000-9999-9998-.-6750＝? 9999×9999+19999＝? 99999999 9+99+999+9999+99999+999999+9999999+99999999=? 9+99+999+9999+99999+999999+9999999+99999999+999999999+999999 9+99+999+9999+99999+999999+9999999+99999999=( ) 9+99+999+9999+.+99999999=（10-1）+（10的平方-1）+.+（10的八次方-1）-8=?求后 谁知道1亿加9999亿＝多少? 最小的自然数是0，最大的八位数是99999999，故答案为：0，99999999． 9+99+99+999+9999+99999+999999+999999+9999999+99999999+999999