问题
解答题
|
答案
,456+455×457 456×457-1
=
,456+(456-1)×457 456×457-1
=
,456+456×457-457 456×457-1
=
,456×457-1 456×457-1
=1.
|
,456+455×457 456×457-1
=
,456+(456-1)×457 456×457-1
=
,456+456×457-457 456×457-1
=
,456×457-1 456×457-1
=1.