0.45×0.45+0.45×0.55=0.45(0.45+0.55)=0.45
0.45*(0.45+0.55)=0.45*1=0.45
(0.45+0.55)x0.45=1x0.45=0.45
0.45*0.45+0.45*0.55=0.45*(0.45+0.55)=0.45*1=0.45