1.=（7.5+2.5）×0.25710-(18×45.4÷18)+122÷(8/5×25/24)=10×0.25710-45.4+122÷5/3=2.5710-45.4+366/5=2.5710-45.4+73.2=30.3712.25×1.8+12.5×0.18【1-（1/2+1/3)】×36=25×1.8+12.5×0.18(1-5/6)×36=25×1.8+12.5×0.18×1/6×36=25×1.8+12.5×0.18×6=25×1.8+75×0.18=(25+7.5)×1.8=58.5