1、48÷[(-2)^3-(-4)] =48÷(-8+4) =48÷(-4) =-12 2、(-1)^3×(-5)÷[(-3)^2+2×(-5)] =(-1)^3×(-5)÷(9-10) =(-1)×(-5)÷(-1) =-5 3、(-2/9)+(-7/9)-(-2) =-1+2 =1 4、4.6-(-3/4+1.6-4)-3/4 =4.6-(-3.15)-0.75 =...