3.2*42.3*3.75-12.5*0.423*16简便计算

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3.2*42.3*3.75-12.5*0.423*16简便计算
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3.2*42.3*3.75-12.5*0.423*16简便计算
3.2*42.3*3.75-12.5*0.423*16
简便计算

3.2*42.3*3.75-12.5*0.423*16简便计算
=32*4.23*3.75-1.25*4.23*16
=4.23*16*(2*3.75-1.25)
=4.23*16*6.25
=4.23*100
=423

423

=0.8*4*42.3*3.75-12.5*0.423*2*8
=0.8*(4*3.75)*42.3-(12.5*8)*2*0.423
=0.8*15*42.3-100*2*0.423
=12*42.3-200*0.423
=12*42.3-2*42.3
=10*42.3
=423