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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| 566 + 230 - 414 = | 574 + 139 + 190 = | 327 - 128 + 794 = | 400 + 210 + 243 = |
| 120 - 105 + 120 = | 251 - 182 + 321 = | 345 + 141 + 458 = | 460 - 168 + 616 = |
| 540 + 200 - 242 = | 837 + 112 - 292 = | 614 + 371 - 818 = | 591 - 153 - 151 = |
| 896 - 579 + 609 = | 930 - 493 + 442 = | 804 - 779 + 560 = | 394 + 376 - 271 = |
| 284 + 109 - 139 = | 261 + 496 - 462 = | 120 + 450 + 413 = | 569 + 205 - 743 = |
消防员爸爸