999999999+99999999+9999999+3=?

999999999+99999999+9999999+3=? 9+99+999+9999+99999+999999+9999999+99999999+999999999+9999999999等于多少,有简便方法吗? 9+99+999+9999+99999+999999+9999999+99999999+999999999等于多少? 9+99+99+999+9999+99999+999999+999999+9999999+99999999+999999999=? 9999999999＋999999999＋99999999＋99999＋9999＋999＋99＋9＝? 999999999+999999999-999999999*999999999/999999999 9+99+999+9999+...99999999 9+99+999+9999...+99999999 99999999 99999999 9+9+99+999+99999+999999999等于多少? 999999999减999999999加999999999除999999999 9+99+999+9999+99999+999999+9999999+99999999=? 9+99+999+9999+99999+999999+9999999+99999999=( ) 99999999*99999999= 99999999*99999999= 99999999×99999999 等于多少, 999999999×999999999÷999999999+1=