99+999+9999+99999这题如何做,要巧算,

99+999+9999+99999＝ 99+999+9999+99999 是多少? 99+999+9999+99999+4 9+99+999+9999+9999+99999=? 9*99*999*9999*99999*999999=?3Q9*99*999*9999*99999*99999有规录 9+99+999+9999+99999+999999=? 9十99+999+9999+99999 9+99+999+9999+99999 = = 99+999+9999+99999,简便计算 99＋999＋9999＋99999 (9+99+999+9999+99999+999999+9999999)×9×99×999×9999×99999÷9000000=? 999+9999+9999*9999+99999/99999 如何计算9+99+999+9999+99999+999999列出算式 999999+99999+9999+999+99+9+6怎么简算 9+99+999+9999+99999的简便运算 99999+9999+999+99+9=?请写出算式. 9+99+999+9999+99999+999999-10000简洁明了者 9/10+99/100+999/1000+9999/1000+99999/10000