0.45×1.8如何简便计算
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![0.45×1.8如何简便计算](/uploads/image/z/1654561-1-1.jpg?t=0.45%C3%971.8%E5%A6%82%E4%BD%95%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97)
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0.45×1.8如何简便计算
0.45×1.8如何简便计算
0.45×1.8如何简便计算
0.45×1.8
=0.45×2×0.9
=0.9×0.9
=0.81
0.45*1.8=(0.45*2)*(1.8/2)=0.9*0.9=9*9/100=81/100=0.81
0.45*2*0.9=0.81