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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| 793 + 118 = | 626 - 259 = | 563 - 284 = | 681 - 499 = |
| 920 - 699 = | 483 + 247 = | 155 + 157 = | 640 - 359 = |
| 432 - 285 = | 236 + 486 = | 874 - 689 = | 770 - 689 = |
| 492 + 259 = | 732 - 565 = | 268 + 299 = | 158 + 269 = |
| 267 - 178 = | 199 + 434 = | 610 - 599 = | 302 - 175 = |
| 355 + 268 = | 377 + 463 = | 163 + 757 = | 425 - 266 = |
| 211 - 149 = | 735 + 198 = | 455 - 378 = | 208 - 149 = |
| 531 - 149 = | 245 + 389 = | 816 - 237 = | 598 + 264 = |
| 266 + 499 = | 814 - 327 = | 369 + 443 = | 389 + 139 = |
| 677 + 245 = | 710 - 367 = | 413 - 388 = | 348 + 383 = |
| 148 + 589 = | 128 + 285 = | 664 - 389 = | 159 + 465 = |
| 200 - 164 = | 914 - 438 = | 236 + 475 = | 871 - 597 = |
| 265 + 588 = | 340 - 271 = | 634 - 288 = | 395 + 469 = |
| 155 + 787 = | 397 + 157 = | 710 - 175 = | 649 + 275 = |
消防员爸爸