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30x[7.5÷(2.7%1.2)]脱式计算

30x[7.5÷(2.7-1.2)] =30x(7.5÷1.5) =30x5 =150

(1)2.7+7.3×1.5=2.7+10.95=13.65(2)2.5×0.32×12.5=(2.5×4)×(0.8×12.5)=10×10=100(3)17.68÷5.2+2.7×1.5=3.4+4.05=7.45(4)3.66×0.8+0.34×0.8-0.8=(3.66+0.34-1)×0.8=3×0.8=2.4(5)35.6-5×1.73=35.6-8.65=26.95(6)9.6×28.5+0.285×...

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