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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| 600 - 203 + 474 = | 875 - 754 + 481 = | 146 + 287 - 124 = | 248 + 582 - 335 = |
| 565 - 417 + 554 = | 616 + 188 - 649 = | 996 - 341 - 247 = | 274 + 714 - 791 = |
| 207 - 164 + 513 = | 854 - 564 + 472 = | 348 - 282 + 690 = | 142 + 517 - 180 = |
| 540 - 519 + 967 = | 388 - 132 + 408 = | 886 - 509 - 288 = | 608 - 258 - 327 = |
| 201 + 449 + 239 = | 734 + 174 - 715 = | 935 - 107 - 752 = | 603 + 175 + 144 = |
消防员爸爸