怎样简便计算0.6666*0.8 0.1111*5.2

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怎样简便计算0.6666*0.80.1111*5.2怎样简便计算0.6666*0.80.1111*5.2怎样简便计算0.6666*0.80.1111*5.20.6666*0.8=0.1111*6*0.

怎样简便计算0.6666*0.8 0.1111*5.2
怎样简便计算0.6666*0.8 0.1111*5.2

怎样简便计算0.6666*0.8 0.1111*5.2
0.6666*0.8=0.1111*6*0.8=1111*48/100000=53328/100000=0.533328
0.1111*5.2=1111*52/100000=57772/100000=0.57772

0.6666*0.8=0.1111*0.8*(5+1)=0.4444+0.08888=0.53328
0.1111*5.2=0.1111*5+0.1111*0.2=0.5555+0.02222=0.57772
这个好像不算简化,但已经够简单了