4.4+13.6*0.9
=4.4+13.6x1-13.6x0.1
=4.4+13.6-1.36
=18-1.36
=16.640.9去哪了？4.4+13.6*0.9=4.4+13.6x(1-0.1)=4.4+13.6x1-13.6x0.1=4.4+13.6-1.36=18-1.36=16.64在算一个吧～亲～0.125*0.25*32也是简便哦0.125*0.25*32=0.125x8x0.25x4=1x1=1