原式=(8×0.3×1.2×7.5)÷(2.25×8×6)
=(8×1.2×2.25)÷(2.25×8×6)
=(2.25÷2.25)×(8÷8)×(1.2÷6)
=1×1×0.2
=0.2
(2.4×1.2×7.5)÷(2.25×8×6)
=(2.4÷8)×(1.2÷6)×(7.5÷2.25)
=0.3×0.2×10/3
=0.3×10/3×0.2
=1×0.2
=0.2
解:原式=2.4/8×1.2/6×7.5/2.25
=0.3×0.2×750/225
=3/50×10/3
=1/5
这道题要想简算,可以把÷写成╱,然后约分,这样就会简单很多。