265*(-1.25)-12.5*13.5+0.125*3980
问题描述:
265*(-1.25)-12.5*13.5+0.125*3980
简便计算`!现在就算`给我过程``!
答
=265*(-1.25)+(-1.25)*135+1.25*398
=1.25*(398-265-135)
=1.25*(-2)
=-2.5