1997*19971997/(1998*19981998)怎么做?
问题描述:
1997*19971997/(1998*19981998)怎么做?
答
1997*19971997/(1998*19981998)
=1997*1997*10001/(1998*1998*10001)
=1997*1997/(1998*1998)
=3988009/3992004