Řěšení:
18 + 10 = 28 80 + 9 = 89
45 + 30 = 75 60 + 22 = 82
20 + 11 = 31 70 + 19 = 89
97 + 3 = 100 40 + 41 = 81
50 + 32 = 82 60 + 21 = 81