(-1.53)*0.75-0.53*(-0.75)-3.4*0.75*是乘

问题描述:

(-1.53)*0.75-0.53*(-0.75)-3.4*0.75
*是乘

-3.3

(-1.53)*0.75-0.53*(-0.75)-3.4*0.75
=0.75*(-1.53+0.53-3.4)
=-0.75*4.4
=-3.3