0.39*0.25*026用简便计算

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0.39*0.25*026用简便计算
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0.39*0.25*026用简便计算
0.39*0.25*026用简便计算

0.39*0.25*026用简便计算
0.39*0.25*0.26=39*25*26/1000000
=(40-1)*25*26/1000000
=(40*25*26-25*26)/1000000
=(1000*26-50*13)/1000000
=(26000-650)/1000000
=25350/1000000
=0.02535