(1)=(1999/1998*203/25+406/75*3/2*8又1997/1998)÷203/48
=1999/1998*203/25*48/203+203/25*48/203*8又1997/1998
=【1999*48+(8*1998+1997)*48】/25*1998
=48*(10*1998)/25*1998
=96/5
(2)提取相似公因数
=2
(1)=(1999/1998*203/25+406/75*3/2*8又1997/1998)÷203/48
=1999/1998*203/25*48/203+203/25*48/203*8又1997/1998
=【1999*48+(8*1998+1997)*48】/25*1998
=48*(10*1998)/25*1998
=96/5
(2)提取相似公因数
=2