1-(0.5-4/9)*3*{-2-(-27)}-|1/8-0.25|

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1-(0.5-4/9)*3*{-2-(-27)}-|1/8-0.25|
1-(0.5-4/9)*3*{-2-(-27)}-|1/8-0.25|

1-(0.5-4/9)*3*{-2-(-27)}-|1/8-0.25|
1-(0.5-4/9)*3*{-2-(-27)}-|1/8-0.25|
=1-(1/2-4/9)*3*25-1/8
=1-1/6*25-1/8
=79/24

-79分之24