递等式计算,能简算的就简算.(1)18.23﹣8.39+11.77(2)0.539+12.25﹣0.039(3)5×1.2÷5×1.2(4)8.5×10.1(5)50.3×0.6﹣0.6(6)0.25×23.9×0.4(7)9.3+9.3×6.3+9.3×2.7(8)0.53×(9.25﹣8.96)