(6.4×7.5×8.1)÷(3.2×2.5×2.7)
=(6.4÷3.2)中并×(7.5÷2.5)卖册迹姿芦×(8.1÷2.7)
=2×3×3
=18
6.4×7.5×8.1
=-------------
3.2×2.5×2.7
2×3×3
=-------(雹蠢哗档樱约分)源行
1×1×1
18
=----
1
=18
(6.4×7.5×8.1)/(3.2×2.5×2.7)
=2*3*3
=18
原式=(0.8×8 ×2.5×5 ×0.9×9)÷(0.4×8 ×0.5×5 ×0.3×9)
=0.8×8 ×2.5×5 ×0.9×9÷0.4÷8 ÷0.5÷5 ÷0.3÷9
=0.8÷0.4 ×8÷8 ×1.5÷0.5 ×9÷9 ×0.9÷0.3 ×5÷5
=2×1×3×1×3×1
=2×9
=18
=(6.4×7.5×8.1)÷(丛穗猛4×0.8×2.5×2.7)
=(6.4×7.5×8.1)÷(4×2.5×0.8×2.7)
=(渗桥6.4×7.5×8.1)÷(8×2.7)
=(8×0.8×7.5×2.7×3)÷(族拆8×2.7)
=0.8×7.5×3
=0.8×2.5×3×3
=2×9
=18
=2*3*3=18