2.2*0.1*0.5+0.5*1.82=（0.22+1.82）*0.5=1.02对不对。。。
2.2*0.05+0.5*1.82=2.2*0.5*0.1+0.5*1.82=0.5*（0.22+1.82）=0.5*2.04=0.5*2+0.5*0.04=1+0.02=1.02
