1.08×0.8÷0.21的简便算法

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1.08×0.8÷0.21的简便算法1.08×0.8÷0.21的简便算法1.08×0.8÷0.21的简便算法原式=1.08÷0.21×0.8=1.08÷(21/100)×4/5=108×(100/21

1.08×0.8÷0.21的简便算法
1.08×0.8÷0.21的简便算法

1.08×0.8÷0.21的简便算法
原式=1.08÷0.21×0.8
=1.08÷(21/100)×4/5
=108×(100/21)×4/5
=108×4/(21×5)
=36×4/(7×5)
=144/35

=(1.08*0.8)*(100/21)
=(108*0.8)/21
=((100+8)*0.8)/21
=(80+6.4)/21
=86.4/21
=28.8/7