口算练习
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781 + 149 =805 - 453 =886 - 331 =362 - 286 =689 - 209 =475 + 304 =200 - 189 =251 + 269 =537 + 153 =346 + 588 =117 - 102 =399 + 339 =966 - 222 =652 + 251 =621 - 388 =761 + 212 =426 + 194 =395 + 286 =913 - 573 =549 + 142 =456 + 270 =218 + 422 =365 + 259 =368 + 178 =671 - 326 =693 + 117 =477 + 371 =588 + 163 =120 + 806 =266 + 145 =591 + 324 =698 + 266 =689 - 317 =304 + 202 =413 - 175 =454 + 340 =172 + 154 =207 - 130 =537 + 242 =454 + 484 =808 - 616 =156 - 124 =519 + 211 =245 + 694 =777 - 493 =983 - 378 =505 + 374 =968 - 956 =355 - 348 =
155 + 685 =
425 + 438 =
848 - 202 =
243 + 520 =
481 + 297 =
420 + 247 =
149 + 216 =
788 - 426 =
749 - 589 =
390 + 153 =
242 - 189 =
879 - 725 =
154 + 308 =
696 + 289 =
685 - 508 =
465 + 237 =417 + 331 =916 - 780 =277 + 292 =
102 + 549 =842 - 618 =226 + 141 =193 - 119 =
646 + 171 =441 - 152 =393 + 471 =309 + 448 =
704 - 391 =195 + 279 =370 + 598 =843 + 155 =
350 - 338 =501 - 479 =972 - 273 =510 + 248 =
782 - 311 =572 - 221 =137 + 144 =238 + 253 =
513 + 133 =677 + 280 =812 - 615 =280 - 218 =
116 + 690 =732 - 645 =813 - 495 =589 + 184 =
977 - 568 =342 - 143 =896 - 302 =465 - 100 =
竖式计算
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