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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| 59 + 37 = | 20 - 17 = | 100 - 63 = | 80 - 11 = |
| 45 + 39 = | 50 - 42 = | 47 + 25 = | 71 - 62 = |
| 73 - 26 = | 49 + 41 = | 47 + 46 = | 69 + 27 = |
| 100 - 72 = | 91 - 18 = | 95 - 86 = | 38 + 28 = |
| 47 + 17 = | 90 - 81 = | 55 + 36 = | 47 + 43 = |
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