(-3又1/4)-【(-3又1/4)+5又1/3】=

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    (-3又1/4)-【(-3又1/4)+5又1/3】

    =-3又1/4+3又1/4-5又1/3

    =-5又1/3

    4.4+[(-0.1)+8又1/3+(-11又2/3)]+1又1/3

    =4.4-0.1+8又1/3-11又2/3+1又1/3

    =4.3+9又2/3-11又2/3

    =4.3-2

    =2.3

    1-2-3+4+5-6-7+8+9-10-11+12+……+2009-2010

    =(1-2-3+4)+(5-6-7+8)+...+(2009-2010)

    =0+0+...+(-1)

    =-1

    1/2+(-2/3)-(-4/5)+(-1/2)-(+1/3)

    =(1/2-1/2)-(2/3+1/3)+4/5

    =0-1+4/5

    =-1/5

    (-1又1/2)-(+3又1/4)+(-4又1/3)+(+2又2/3)

    =(-1又1/2-3又1/4)+(2又2/3-4又1/3)

    =-4又3/4-1又2/3

    =-6又5/12

    1又1/3-(2/5-2/3)+(-3/5+1又1/2)

    =(1又1/3+2/3)-(2/5+3/5)+1又1/2

    =2-1+1又1/2

    =2又1/2

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