151 - 50 + 50 + 51 =
181 - 60 + 60 + 61 =
211 - 70 + 70 + 71 =
241 - 80 + 80 + 81 =
271 - 90 + 90 + 91 =
330 - 100 + 100 + 130 =
220 - 100 + 120 =
440 - 100 + 200 + 140 =
550 - 100 + 300 + 150 =