Условие:

1310 + 8
2720 + 6
18 + 19
28 + 19
9190 + 0
82800

1310 + 8 = 3 + 8 = 11
2720 + 6 = 7 + 6 = 13
18 + 19 = 199 = 10
28 + 19 = 299 = 20
9190 + 0 = 1 + 0 = 1
82800 = 20 = 2