Question

3.6乘以42.3乘以3.75减去12.5乘以0.423乘以28怎么简算

Answer 1

3.6*42.3*3.75-12.5*0.423*28=4.23*(3.6*10*3.75-12.5*0.1*28)
=4.23*(36*3.75-28*1.25)
=4.23*[1.25*4*(9*3-7)]
=4.23*(5*20)
=4.23*100
=423