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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| 574 + 206 = | 119 - 114 = | 150 + 728 = | 862 - 460 = |
| 228 + 112 = | 316 + 215 = | 865 - 839 = | 741 + 138 = |
| 378 - 310 = | 119 + 799 = | 228 - 101 = | 104 + 741 = |
| 659 - 379 = | 547 + 235 = | 961 - 589 = | 244 + 405 = |
| 574 - 156 = | 566 - 524 = | 492 + 160 = | 692 - 638 = |
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