5 + 39 + 95 = (5+95) + 39 = 100+39 = 139
6 + 98 + 94 = (6+94) + 98 = 100 + 98 = 198
205 + 199 + 295 = (205+295)+ 199 = 500 + 199 = 699
106 + 198 + 594 = (106+594) + 198 = 700 + 198 = 898
105 + 599 + 195 = (105+195) + 599 = 300 + 599 = 899
306 + 298 + 294 = (306+294) + 298 = 600 + 298 = 898