10: 1 + 0 = 1, 10 - 1 = 9 |
11: 1 + 1 = 2, 11 - 2 = 9 |
12: 1 + 2 = 3, 12 - 3 = 9 |
13: 1 + 3 = 4, 13 - 4 = 9 |
14: 1 + 4 = 5, 14 - 5 = 9 |
15: 1 + 5 = 6, 15 - 6 = 9 |
16: 1 + 6 = 7, 16 - 7 = 9 |
17: 1 + 7 = 8, 17 - 8 = 9 |
18: 1 + 8 = 9, 18 - 9 = 9 |
19: 1 + 9 = 10, 19 - 10 = 9 |
20: 2 + 0 = 2, 20 - 2 = 18 |
21: 2 + 1 = 3, 21 - 3 = 18 |
22: 2 + 2 = 4, 22 - 4 = 18 |
23: 2 + 3 = 5, 23 - 5 = 18 |
24: 2 + 4 = 6, 24 - 6 = 18 |
25: 2 + 5 = 7, 25 - 7 = 18 |
26: 2 + 6 = 8, 26 - 8 = 18 |
27: 2 + 7 = 9, 27 - 9 = 18 |
28: 2 + 8 = 10, 28 - 10 = 18 |
29: 2 + 9 = 11, 29 - 11 = 18 |
30: 3 + 0 = 3, 30 - 3 = 27 |
31: 3 + 1 = 4, 31 - 4 = 27 |
32: 3 + 2 = 5, 32 - 5 = 27 |
33: 3 + 3 = 6, 33 - 6 = 27 |
34: 3 + 4 = 7, 34 - 7 = 27 |
35: 3 + 5 = 8, 35 - 8 = 27 |
36: 3 + 6 = 9, 36 - 9 = 27 |
37: 3 + 7 = 10, 37 - 10 = 27 |
38: 3 + 8 = 11, 38 - 11 = 27 |
39: 3 + 9 = 12, 39 - 12 = 27 |
40: 4 + 0 = 4, 40 - 4 = 36 |
41: 4 + 1 = 5, 41 - 5 = 36 |
42: 4 + 2 = 6, 42 - 6 = 36 |
43: 4 + 3 = 7, 43 - 7 = 36 |
44: 4 + 4 = 8, 44 - 8 = 36 |
45: 4 + 5 = 9, 45 - 9 = 36 |
46: 4 + 6 = 10, 46 - 10 = 36 |
47: 4 + 7 = 11, 47 - 11 = 36 |
48: 4 + 8 = 12, 48 - 12 = 36 |
49: 4 + 9 = 13, 49 - 13 = 36 |
50: 5 + 0 = 5, 50 - 5 = 45 |
51: 5 + 1 = 6, 51 - 6 = 45 |
52: 5 + 2 = 7, 52 - 7 = 45 |
53: 5 + 3 = 8, 53 - 8 = 45 |
54: 5 + 4 = 9, 54 - 9 = 45 |
55: 5 + 5 = 10, 55 - 10 = 45 |
56: 5 + 6 = 11, 56 - 11 = 45 |
57: 5 + 7 = 12, 57 - 12 = 45 |
58: 5 + 8 = 13, 58 - 13 = 45 |
59: 5 + 9 = 14, 59 - 14 = 45 |
60: 6 + 0 = 6, 60 - 6 = 54 |
61: 6 + 1 = 7, 61 - 7 = 54 |
62: 6 + 2 = 8, 62 - 8 = 54 |
63: 6 + 3 = 9, 63 - 9 = 54 |
64: 6 + 4 = 10, 64 - 10 = 54 |
65: 6 + 5 = 11, 65 - 11 = 54 |
66: 6 + 6 = 12, 66 - 12 = 54 |
67: 6 + 7 = 13, 67 - 13 = 54 |
68: 6 + 8 = 14, 68 - 14 = 54 |
69: 6 + 9 = 15, 69 - 15 = 54 |
70: 7 + 0 = 7, 70 - 7 = 63 |
71: 7 + 1 = 8, 71 - 8 = 63 |
72: 7 + 2 = 9, 72 - 9 = 63 |
73: 7 + 3 = 10, 73 - 10 = 63 |
74: 7 + 4 = 11, 74 - 11 = 63 |
75: 7 + 5 = 12, 75 - 12 = 63 |
76: 7 + 6 = 13, 76 - 13 = 63 |
77: 7 + 7 = 14, 77 - 14 = 63 |
78: 7 + 8 = 15, 78 - 15 = 63 |
79: 7 + 9 = 16, 79 - 16 = 63 |
80: 8 + 0 = 8, 80 - 8 = 72 |
81: 8 + 1 = 9, 81 - 9 = 72 |
82: 8 + 2 = 10, 82 - 10 = 72 |
83: 8 + 3 = 11, 83 - 11 = 72 |
84: 8 + 4 = 12, 84 - 12 = 72 |
85: 8 + 5 = 13, 85 - 13 = 72 |
86: 8 + 6 = 14, 86 - 14 = 72 |
87: 8 + 7 = 15, 87 - 15 = 72 |
88: 8 + 8 = 16, 88 - 16 = 72 |
89: 8 + 9 = 17, 89 - 17 = 72 |
90: 9 + 0 = 9, 90 - 9 = 81 |
91: 9 + 1 = 10, 91 - 10 = 81 |
92: 9 + 2 = 11, 92 - 11 = 81 |
93: 9 + 3 = 12, 93 - 12 = 81 |
94: 9 + 4 = 13, 94 - 13 = 81 |
95: 9 + 5 = 14, 95 - 14 = 81 |
96: 9 + 6 = 15, 96 - 15 = 81 |
97: 9 + 7 = 16, 97 - 16 = 81 |
98: 9 + 8 = 17, 98 - 17 = 81 |
99: 9 + 9 = 18, 99 - 18 = 81 |