1999+1994/1999*1/5-1998/1 - 知识问答

1999+1994/1999*1/5-1998/1999

2个回答

1999+1994/1999*1/5-1998/1999
=1999+398.8/1999-(1-1/1999)
=1999-1+1/1999+398.8/1999
=1998+399.8/1999
=1998+0.2
=1998.2

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