Условие:

8 + 79
5 + 68
135 + 4
146 + 2
5 + (168)
7 + (159)

8 + 79 = 159 = 6
5 + 68 = 118 = 3
135 + 4 = 8 + 4 = 12
146 + 2 = 8 + 2 = 10
5 + (168) = 5 + 8 = 13
7 + (159) = 7 + 6 = 13