计算下面各题.(24+9.6÷2.4)×0.5 125﹣100÷(2.07﹣1.27)13.5÷[(7.2﹣0.53)×25]4.5×[(5.52﹣5.48)÷0.01].
1375+450÷18×25
55×(++++)
++++++++
2.009×43+20.09×2.9+200.9×0.28
(2.5×)÷(×1.8)-0.75÷