увеличь на 8 9 17 32 61 90 86 Уменьши на 9 9 16 50 39 72 95

1) 9+8 = 17
17+8 = 25
32 + 8 = 40
61 + 8 = 69
90 + 8 = 98
86 + 8 = 94

2) 9 - 9 = 0
16 - 9 = 7
50 - 9 = 41
39 - 9 = 30
72 - 9 = 63
95 - 9 = 86