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30x[7.5÷(2.7%1.2)]脱式计算

2.7×1.2 27×0.23 0.27×33的脱式计算简便 =2.7x(1.2+10x0.23+0.1x33) =2.7x(1.2+2.3+3.3) =2.7x6.8 =18.36

(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×...

(1)3.2×8+3.2×3-3.2=3.2×(8+3-1)=3.2×10=32;(2)4.8×6.3+2.7×4.8+4.8=4.8×(6.3+2.7+1)=4.8×10=48;(3)(0.7+99×0.7)×3=[0.7×(99+1)]×3=[0.7×100]×3=70×3=210;(4)29×3.8-29×0.8=29×(3.8-0.8)=29×20=580.

3.29+0.73+2.27 3.29-0.73-2.27 7.5+2.5-7.5+2.5 7.325-3.29-3.325 7.325-(5.325+1.7) 7.325-(5.325-1.7) 3.29+0.73-2.29+2.27 3.29×0.25×4 0.125×8.8 0.25×0.28 0.125×3.2×2.5 35×40.2 0.25×4÷0.25×4 3.5×9.9 3.5×99+3.5 3.5×101-3.5 3.5×9.9+3...

超时了。 1.08/(4.5*0.2)=1.08/0.9=1.2 2.81*0.18/0.9=2.81*(0.18/0.9)=2.81*0.2=0.562

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