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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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| 14 + 85 = | 100 - 31 = | 21 + 67 = | 64 - 28 = |
| 74 - 53 = | 49 + 33 = | 14 + 54 = | 31 + 33 = |
| 75 - 36 = | 79 - 74 = | 49 + 47 = | 35 + 29 = |
| 100 - 45 = | 58 - 51 = | 100 - 23 = | 99 - 64 = |
| 38 + 22 = | 92 - 63 = | 48 + 46 = | 69 + 23 = |
| 30 + 55 = | 14 + 14 = | 64 - 13 = | 61 + 30 = |
| 56 + 38 = | 47 + 44 = | 72 - 53 = | 59 + 41 = |
| 99 - 92 = | 49 + 49 = | 22 + 70 = | 61 - 24 = |
| 39 - 28 = | 95 - 82 = | 48 + 48 = | 97 - 91 = |
| 91 - 62 = | 78 - 50 = | 49 + 43 = | 99 - 68 = |
| 14 + 65 = | 20 + 80 = | 81 - 64 = | 69 + 31 = |
| 23 + 73 = | 65 - 26 = | 81 - 32 = | 99 - 38 = |
| 65 + 23 = | 97 - 88 = |