(-81)÷(+3又1/4)×(-4/9)÷(-1又1/13)

1个回答

  • (1)

    (-81)÷(+3又1/4)×(-4/9)÷(-1又1/13)

    =(-81)÷(13/4)×(-4/9)÷(-14/13)

    =(-81)×(4/13)×(-4/9)×(-13/14)

    =-72/7

    (2)

    (-3)的三次方÷2又1/4×(-2/3)的二次方+4-2×(-1/3)

    =(-27)×(4/9)×(4/9)+4+2/3

    =-16/3+4+2/3

    =-2/3

    (3)

    -1的四次方-(1-0.5)×1/3×【2-(-3)的二次方】

    =-1-0.5×(1/3)×(-7)

    =-1+7/6

    =1/6

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