-4.5*(-0.
问题描述：
-4.5*(-0.
-4.5*(-0.32)= 等于多少
答
1.(2.1+2.1+2.1+2.1)乘12.5=2.1*4*12.5=2.1*(4*12.5)=2.1*50=1052:2.3乘4.5-4.5—4.5乘0.3=4.5*(2.3-1-0.3)=4.5*1=4.53:8.6+2.5乘（0.32除0.4）=8.6+2.5*0.8=8.6+2=10.6