巧解下题：-1.53*0.75-0.53*（-0.75）-3.4*0.75=?
问题描述：
巧解下题：-1.53*0.75-0.53*（-0.75）-3.4*0.75=?
要过程!
答
-1.53×0.75-0.53×(-0.75)-3.4×0.75
=(-1.53+0.53-3.4)×0.75
=-4.4×0.75
=-1.1×4×3/4
=-1.1×3
=-3.3