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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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| 30 + 45 = | 69 - 62 = | 17 + 30 = | 86 - 81 = |
| 11 + 78 = | 45 + 45 = | 38 - 27 = | 73 - 36 = |
| 48 + 46 = | 28 + 61 = | 39 + 12 = | 48 - 33 = |
| 55 + 38 = | 11 + 76 = | 99 - 88 = | 61 + 34 = |
| 80 - 71 = | 16 + 32 = | 30 + 23 = | 49 + 41 = |
| 76 - 53 = | 34 + 17 = | 11 + 58 = | 43 + 31 = |
| 100 - 63 = | 49 + 37 = | 65 - 24 = | 69 - 38 = |
| 18 + 13 = | 85 - 78 = | 49 + 34 = | 66 + 27 = |
| 73 - 58 = | 29 + 70 = | 91 - 32 = | 29 + 11 = |
| 100 - 61 = | 79 - 77 = | 59 + 32 = | 11 + 16 = |
| 90 - 88 = | 70 - 41 = | 92 - 21 = | 90 - 73 = |
| 93 - 57 = | 60 - 52 = | 67 + 28 = | 48 - 15 = |
| 49 - 35 = | 98 - 79 = |