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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| 976 - 646 = | 737 + 168 = | 183 - 151 = | 867 - 506 = |
| 175 + 809 = | 737 - 148 = | 925 - 790 = | 227 + 345 = |
| 175 - 159 = | 221 + 467 = | 183 + 662 = | 101 + 763 = |
| 600 + 277 = | 968 - 279 = | 550 - 495 = | 367 + 334 = |
| 223 + 589 = | 801 + 167 = | 223 - 166 = | 237 - 220 = |
消防员爸爸