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3.2 x0.5x3.6
=0.5*16*0.2*3.6 将3.2拆分成16*0.2
=(0.5*16)*(0.2*3.6 ) 然后把0.5*1.6和0.2*3.6先算
=8*0.72
=5.76
=0.5*16*0.2*3.6 将3.2拆分成16*0.2
=(0.5*16)*(0.2*3.6 ) 然后把0.5*1.6和0.2*3.6先算
=8*0.72
=5.76
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