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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| 445 + 322 = | 228 - 163 = | 169 + 623 = | 226 - 199 = |
| 169 - 137 = | 803 + 187 = | 656 - 593 = | 475 + 182 = |
| 110 + 619 = | 365 + 205 = | 584 - 423 = | 945 - 130 = |
| 526 + 400 = | 260 + 458 = | 627 - 162 = | 118 + 709 = |
| 349 - 242 = | 139 - 114 = | 604 - 293 = | 305 + 485 = |
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