怎么算啊| -2/3|除以|14/3| (-4又1/3)+2又1/2

1个回答

  • -3又1/4+(6又2/3)+(+2又2/3)+3又1/4

    =-3又1/4+3又1/4+(6+2/3)+(2+2/3)

    =8+4/3

    =9又1/3

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

    =-3又1/4+2又1/4+3又2/3 -1又2/3

    =-1+2

    =1

    (-3)-(-2又2/5)

    =-3+2又2/5

    =-3/5

    (-1)-[-2-(-4)-|-1/2|-(-1/3)]

    =1-[-2+4-1/2+1/3]

    =1-[2-1/6]

    =1-2+1/6

    =-1+1/6

    =-5/6

    用简便方法:

    0.125+(+3又1/4)+(-3又1/8)+(+7/8)+(-0.25)

    =1/8+3又1/4-3又1/8+7/8-1/4

    =1/8-3又1/8+7/8+3又1/4-1/4

    =-3+7/8+3

    =7/8

    (+3/17)+(3.36)+[(+7.36)+(+14/17)]

    =3/17+3.36+[7.36+14/17]

    =3/17+3.36+7.36+14/17

    =1+10.72

    =11.72

    (-3/4)+(+3又3/8)+(+0.75)+(-4又1/2)+(+1又5/8)

    =-3/4+3又3/8+3/4-4又1/2+1又5/8

    =-3/4+3/4-4又1/2+3又3/8+1又5/8

    =-4又1/2+5

    =1/2

    (+1)+(-2)+(+3)+(-4)+••••••+(+99)+(-100)

    =(1-2)+(3-4)+••••••+(99-100)

    =(-1)*50

    =-50