Условие:

169 + 8
179 + 5
18 − (124)
12 − (3 + 9)
189 + 5
157 + 8

169 + 8 = 7 + 8 = 15
179 + 5 = 8 + 5 = 13
18 − (124) = 188 = 10
12 − (3 + 9) = 1212 = 0
189 + 5 = 9 + 5 = 14
157 + 8 = 8 + 8 = 16