9.728÷3.2÷25
=9.728÷8÷0.4÷25
=9.728÷8÷10
=0.9728÷8
=(0.9+0.72+0.008)÷8
=(0.8+0.1+0.72+0.008)÷8
=0.1+0.0125+0.09+0.001
=0.1216
(4.5×7.5×4.8)÷(1.5×2.5×2.4)
=(1.5×3×2.5×3×2.4×2)÷(1.5×2.5×2.4)
=1.5×3×2.5×3×2.4×2÷1.5÷2.5÷2.4
=3×3×2
=18
祝楼主学习进步!
9.728/3.2/25
=9.728/(3.2*25)
=9.728/80
接下来会吧?
(4.5*7.5*4.8)/(1.5*2.5*2.4)
=(4.5*7.5*4.8)*(2/3*2/5*5/12)
=(4.5*7.5*4.8)*1/9
接下来乘法分配律,会吧
给我加分哦!!!