问题
解答题
999
|
答案
999
×999,998 999
=999+
)×999,998 999
=999×999+
×999,998 999
=×999+998,
=999×1000-999+998,
=999000-(999-998),
=999000-1,
=998999.
999
|
999
×999,998 999
=999+
)×999,998 999
=999×999+
×999,998 999
=×999+998,
=999×1000-999+998,
=999000-(999-998),
=999000-1,
=998999.