跟着消防员爸爸学习C++编程与算法（请备注算法学习）
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| 12 + 12 = | 89 - 67 = | 53 + 47 = | 100 - 74 = |
| 72 + 28 = | 79 - 75 = | 40 + 34 = | 91 - 42 = |
| 36 + 52 = | 12 + 87 = | 52 + 35 = | 98 - 74 = |
| 58 - 12 = | 85 - 32 = | 38 + 22 = | 92 - 83 = |
| 11 + 84 = | 21 + 78 = | 30 - 12 = | 86 - 17 = |
| 69 - 57 = | 46 + 38 = | 66 - 35 = | 22 - 18 = |
| 92 - 23 = | 35 + 25 = | 97 - 94 = | 49 + 41 = |
| 29 + 11 = | 56 + 36 = | 94 - 93 = | 83 - 66 = |
| 18 + 15 = | 16 + 82 = | 48 + 16 = | 12 + 66 = |
| 90 - 46 = | 100 - 61 = | 78 - 19 = | 77 - 73 = |
| 64 + 27 = | 68 - 25 = | 90 - 52 = | 14 + 85 = |
| 60 - 33 = | 48 + 48 = | 83 - 71 = | 59 + 34 = |
| 25 + 33 = | 60 + 39 = |
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