(-1)^2*(-3)^2-(-1/2)^2003*(-2)^2002/(2/9) = 2*9-{(-1/2)^2002*(-2)^2002*(-1/2)^1}/(2/9) =18-{(1^2002*(-1/2)^1}/(2/9) =18-{(-1/2*(9/2) =18+9/4 =81/4 这样的话够清楚了吧
=9-(-1/2)^2003*(-2)^2002*9/2=9+1/2*9/2=9+9/4=11.25