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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| 432 + 265 - 533 = | 986 - 689 + 545 = | 934 - 487 + 317 = | 831 + 109 - 409 = |
| 718 + 124 - 552 = | 618 - 278 + 248 = | 262 + 542 + 134 = | 266 + 525 + 147 = |
| 914 - 103 - 809 = | 541 - 102 + 375 = | 802 - 793 + 232 = | 366 + 289 + 120 = |
| 975 - 716 + 361 = | 433 + 200 + 191 = | 937 - 798 + 240 = | 662 + 278 - 887 = |
| 408 + 436 - 156 = | 835 - 537 + 404 = | 850 - 475 + 289 = | 214 + 405 - 533 = |
消防员爸爸