计算下列各题,怎样简便就怎样算写出算式过程

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1、4.73+9+27%-4
=4.73+9+0.27-4
=（4.73+0.27）+（9-4）
=5+5=102、1/4×17/53+36/53×25%
=25%×17/53+36/53×25%
=25%×（17/53+36/53)
=25%×1
=25%=0.25
3、2/9×3/8+0.375+7/9×37.5%
=2/9×0.375+0.375+7/9×0.375
=0.375×（2/9+1+7/9)
=0.375×2
=0.754、2.5×1/5+0.35×20%
=2.5×20%+0.35×20%
=（2.5+0.35）×20%
=2.85×20%
=2.85×0.2
=0.57