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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| 81 - 75 = | 14 + 15 = | 100 - 71 = | 95 - 89 = |
| 68 + 27 = | 79 - 60 = | 55 - 38 = | 39 + 14 = |
| 86 - 13 = | 50 - 25 = | 57 + 25 = | 60 - 21 = |
| 33 + 29 = | 79 - 38 = | 70 - 62 = | 39 + 23 = |
| 11 + 36 = | 48 + 43 = | 24 + 51 = | 20 + 59 = |
| 49 - 17 = | 49 + 42 = | 18 + 15 = | 51 - 47 = |
| 78 - 16 = | 32 + 62 = | 81 - 52 = | 48 - 34 = |
| 33 + 54 = | 11 + 45 = | 90 - 46 = | 92 - 58 = |
| 71 + 19 = | 93 - 44 = | 79 - 68 = | 58 + 35 = |
| 97 - 96 = | 88 - 47 = | 51 + 49 = | 97 - 82 = |
| 65 + 34 = | 14 + 75 = | 28 + 24 = | 99 - 98 = |
| 100 - 85 = | 32 + 60 = | 11 + 14 = | 11 + 11 = |
| 75 - 40 = | 56 + 37 = |
消防员爸爸