巧算:9999X9999+9999 = = =
用简便方式计算9999x7778+3333x9999对不起,是9999*7778+3333*6666
9999*9999*+19999=?
巧算:8+98+998+9998+9999=?
9999+9999+9999+3333+3333+3333=
1.1111*9999+9999*7777= 9999*7778+3333*6666=
9+99+999+9999+9999+99999=?
9+99+99+9999+9999=()
1998 /1999×9999=?
9999/99=
9999²+19999=?
A=9999^1111/9999^2222 B=9999^3333/9999^2222 AB那个大?
3333×6667+9999×1111=