(-1000又2/3)+(-999又5/6)+2000又3/4+(-1又1/2)

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(-1000又2/3)+(-999又5/6)+2000又3/4+(-1又1/2)(-1000又2/3)+(-999又5/6)+2000又3/4+(-1又1/2)(-1000又2/3)+(-999又5/

(-1000又2/3)+(-999又5/6)+2000又3/4+(-1又1/2)
(-1000又2/3)+(-999又5/6)+2000又3/4+(-1又1/2)

(-1000又2/3)+(-999又5/6)+2000又3/4+(-1又1/2)
(-1000又2/3)+(-999又5/6)+2000又3/4+(-1又1/2)
=-1000-2/3-999-5/6+2000+3/4-1-1/2
=-2-5/6+3/4
=-2又1/12