数学题，快来答

来源：百度知道 编辑：UC知道 时间：2024/06/21 19:58:26
-2^2÷4/5x(3/4-4/5) 5+18÷(3/2)^2x(-3/4)-|-2|
-1^3-1/5x[(-3)^2-2^4] (-3)^4÷2又1/4x(-1/3)^3-3^2x(-1/4)-1/4
[2-(3-0.4x1/2)]x[9-(-2)^2]
-3-[-5+(1-1/2x1又1/5)÷(-2)]x(-1)^2008
-2/3^2-(-2)x(1/4-1/2)+0.125^6x8^6

-2^2÷4/5×(3/4-4/5)
=-4×5/4×(15/20-16/20)
=-5×(-1/20)
=1/4

5+18÷(3/2)^2×(-3/4)-|-2|
=5+18×(4/9)×(-3/4)-2
=3-8×(3/4)
=3-6
=-3

-1^3-1/5×[(-3)^2-2^4]
=-1-1/5×(9-16)
=-1+7/5
=2/5

(-3)^4÷2又1/4×(-1/3)^3-3^2×(-1/4)-1/4
=81÷(9/4)×(-1/27)-9×(-1/4)-1/4
=36×(-1/27)+9/4-1/4
=-4/3+2
=2/3

[2-(3-0.4×1/2)]×[9-(-2)^2]
=[2-(3-0.2)]×(9-4)
=(2-3+0.2)×5
=-0.8×5
=-4

-3-[-5+(1-1/2×1又1/5)÷(-2)]×(-1)^2008
=-3-[-5+(1-1/2×(6/5)÷(-2)]×1
=-3-[-5+(1+3/10]
=-3+5-1-3/10
=1-3/10
=7/10

-2/3^2-(-2)×(1/4-1/2)+0.125^6×8^6
=-2/9-(-2)×(-1/4)+(0.125×8)^6
=-2/9-1/2+1^6
=-4/18-9/18+18/18
=5/18