Условие:

45 = ☐ + 5
87 = ☐ + ☐
78 = 70 + ☐
3 + 86
8 + 88
6 + 95
99
8 + 0
0 + 0

45 = 40 + 5
87 = 80 + 7
78 = 70 + 8
3 + 86 = 116 = 5
8 + 88 = 168 = 0
6 + 95 = 155 = 10
99 = 0
8 + 0 = 8
0 + 0 = 0