1.x090.3*0.6+(1.3*0.8-1)*(1-0.6)=0.18+0.04*0.4=0.196
2.x09[0.4*(1-0.86)/0.2]/1.4=2*0.14/1.4=0.2, 打了8折
3.x09416/(1*0.8+2*0.8*0.8)=416/2.08=200, 3*200*1*0.8*0.8*0.8=307.2
4.x09800+800*0.095*3*(1-20%)=800+182.4=982.4
5.x09[200/(10*30%)]/(4/5)=83.3, 共84张
6.x093*2+9*2+15*2+……+39*2+45=(3+39)*6*2/2+45=297
7.x094*3/5=2.4, 3*(2.4+4)=19.2