9999+99+9=?

9+99+99+9999+9999=() 9999+99+9=? 9+99+999+9999+9999+99999=? 9+99+999+9999+99999 = = 简算：9999+999+99+9=?） 9+99+999+9999+99999+999999=? (-9)+(-99)+(-999)+(-9999) 9999+999+99+9 (9+99+999+9999+99999+999999+9999999)×9×99×999×9999×99999÷9000000=? 9*99*999*9999*99999*999999=?3Q9*99*999*9999*99999*99999有规录 9999/99= 9999+999+99+9 = = 脱式计算要脱式计算要9999+999+99+9== 99999+9999+999+99+9=?请写出算式. 9+99+999+9999+99999= 简便方法 9999999+999999+99999+9999+999+99+9= 9+99+999+9999+99999+999999+9999999+99999999=? 9+99+999+9999+99999+999999+9999999+99999999=( ) 9999+999+99+9 9999+999+99+9+6 巧算