有理数的加减乘除乘方运算习题带答案

1个回答

  • 3+2^2×(-1/5)

    原式=3+4×(-1/5)

    =3-4/5

    =11/5

    18-6÷(-2)×(-1/3)

    原式=18-(-3)×(-1/3)

    =18-1

    =17

    (-3)^2×[-2/3+(-5/9)]

    原式=9×(-11/9)

    =-11

    8+(-3)^2×(-2)

    原式=8+9×(-2)

    =8-18

    =-10

    100÷(-2)^2-(-2)÷(-2/3)

    原式=100÷4-3

    =25-3

    =22

    36×(1/2-1/3)^2

    原式=36×(1/6)^2

    =36×(1/36)

    =1

    12.7÷(-8/19)×0

    原式=0

    4×(-3)^2+6

    原式=4×9+6

    =36+6

    =42

    (-3/4)×(-8+2/3-1/3)

    原式=(-3/4)×(-8+1/3)

    =(-3/4)×(-23/3)

    =23/4

    (-2)^3-13÷(-1/2)

    原式=(-8)-(-26)

    =18

    0-2^3÷(-4)^3-1/8

    原式=0-8÷(-64)-1/8

    =0+1/8-1/8

    =0

    (-2)^3×0.5-(-1.6)^2÷(-2)^2

    原式=(-8)×(1/2)-(-8/5)^2÷4

    =(-4)-(64/25)÷4

    =(-4)-16/25

    =-116/25

    (-3/2)×[(-2/3)^2-2]

    原式=(-3/2)×(4/9-2)

    =(-3/2)×(-14/9)

    =7/3

    [(-3)^2-(-5)^2]÷(-2)

    原式=(9-25)÷(-2)

    =(-16)÷(-2)

    =8

    16÷(-2)^3-(-1/8)×(-4)

    原式=16÷(-8)-1/2

    =-2-1/2

    =-5/2