4.计算:(写竖式)
20×36= | 48×33= | 36×25= | 52×63= | 15×52= |
34×45= | 15×60= | 46×50= | 28×48= | 23×54= |
3.直接写出下面格式的得数
0 153389 153397 153403 153407 153413 153415 153419 153425 153427 153433 153439 153443 153445 153449 153455 153457 153463 153467 153469 153473 153475 153479 153481 153483 153484 153485 153487 153488 153489 153491 153493 153497 153499 153503 153505 153509 153515 153517 153523 153527 153529 153533 153539 153545 153547 153553 153557 153559 153565 153569 153575 153583 199269
40×40= | 91×50= | 22×30= | 200×40= | 50×60= |
20×80= | 11×70= | 80×20= | 40×90= | 50×30= |