3.75乘4.23乘36-125乘0.423乘2.8

你好,提取公因数吧,

3.75*4.23*36-125*0.423*2.8
=4.23*(3.75*36-12.5*2.8)
=4.23*12.5*(0.3*36-2.8)
=4.23*12.5*8
=423
好了,你检查一下哦.
呵呵

3.75*4.23*3.6-125*0.423*2.8
=3.75*4.23*4*0.9-12.5*4.23*2.8
=3.75*4*4.23*0.9-12.5*4.23*2.8
=15*4.23*0.9-12.5*4.23*2.8
=4.23*(15*0.9-12.5*2.8)
=4.23*(13.5-12.5*4*0.7)
=4.23*(13.5-5*0.7)
=4.23*(13.5-3.5)
=4.23*10
=42.3.

3.75*4.23*36-125*0.423*2.8=3.75*4.23*2*18+5*25*0.423*2.8=7.5*4.23*18+14*25*0.423=7.5*0.423*10*18+350*0.423=0.423*(7.5*18+350)=0.423*(135+350)=205.2

解：原式=3.75*4*9*4.23-12.5*4.23*4*0.7
=4.23*（15*9-50*0.7）
=4.23*（135-35）
=4.23*100
=423
一定对的，相信我。

回答者：chenkyn - 门吏 二级 12-15 10:04
这个一定对~！我奥数的~！请相信我~！选他吧~！

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