1.650*(4/5)=520元2.1-(1/2)*(1/3)-(1/2)=1/3
1. 520元2. 1/3
1. 520元2. 1/3 1.650*(4/兆慎5)=520元2.1-(1/2)*(1/族薯敬手枝3)-(1/2)=1/3
650 X 4/5 = 5201 - 1/2 - (1-1/2) X 1/3 = 1/3
1.650-650*1/5=520元2.1-1/2-(1-1/2)*1/3=1/3