6．竖式计算
| 250×27= | 720÷36= | 408×25= |
| 625÷25= | 537×18= | 5138÷71=验算： |
5．直接写得数
0 153365 153373 153379 153383 153389 153391 153395 153401 153403 153409 153415 153419 153421 153425 153431 153433 153439 153443 153445 153449 153451 153455 153457 153459 153460 153461 153463 153464 153465 153467 153469 153473 153475 153479 153481 153485 153491 153493 153499 153503 153505 153509 153515 153521 153523 153529 153533 153535 153541 153545 153551 153559 199269
| 72÷12= | 125×8= | 900÷6= | 760+80= |
| 40×60= | 3600÷60= | 560-180= | 25×4= |
| 720÷80= | 8100÷90= | 60×50= | 640÷80= |
| 78×41≈ | 507×69≈ | 416÷70≈ | 645÷79≈ |
