拆项法:(-2010又5/6)+(-2009又2/3)+40203/4+(-1又1/2)=
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拆项法:(-2010又5/6)+(-2009又2/3)+40203/4+(-1又1/2)=
拆项法:(-2010又5/6)+(-2009又2/3)+40203/4+(-1又1/2)=
拆项法:(-2010又5/6)+(-2009又2/3)+40203/4+(-1又1/2)=
(-2010又5/6)+(-2009又2/3)+40203/4+(-1又1/2)= -2010-5/6-2009-2/3+4020+3/4-1-1/2=-2又1/4