423*9/25*15/4-14/5*0.423*125

问题描述:

423*9/25*15/4-14/5*0.423*125

原式=423*(9/25*15/4-14/5*1/1000*125)
=423*(135/100-14/5*1/8)
=423*(135/100-35/100)
=423*100/100
=423