简便计算,3.875*0.2+38.75*0.09-0.155*12.5
问题描述：
简便计算,
3.875*0.2+38.75*0.09-0.155*12.5
答
3.875*0.2+38.75*0.09-0.155*12.5
=3.875*0.2+3.875*0.9-15.5*0.125
=3.875*1.1-15.5*0.125
=(3.875*1.1+0.125*1.1)-(15.5*0.125+0.125*1.1)
=4*1.1-16.6*0.125
=4.4-16/8-0.6*0.125
=2.325
答
=0.775+3.4875-1.9375
=4.2625-1.9375
=2.325