78 + 89 + 22 = (78 + 22) + 89 = 100 + 89 = 189
43 + 96 + 57 = (43 + 57) + 96 = 100 + 96 = 196
437 + 39 + 13 = (437 + 13) + 39 = 450 + 39 = 489
353 + 22 + 7 = 353 + (22 + 7) = 353 + 29 = 382
784 + 79 + 21 = 784 + (79 + 21) = 784 + 100 = 884
765 + 208 + 135 = (765 + 135) + 208 = 900 + 208 = 1108
122 + (73 + 58) = 122 + 131 = 253
144 + (56 + 99) = 144 + 155 = 299