9999×9999+9999

9999×9999×9999×9999 巧算 9999*9999*9999 9999×9999+9999 9999+9999+9999+9999+9999一直加9999个 999999×9999×9999×9999=? 9999×9999+19999＝? 9999*6666+9999*3333 √9999*9999+19999 1999+9999*9999=? 9999×9999等于多少 9999/666+9999 9999乘9999+1999 9999加9999 9999×9999= 9999^0+9999 9999*1111+9999*7777 9999^2+9999因式分解 9999乘9999