13.甲数是乙数的3倍,数量关系应为( )
| A. | 甲数×3=乙数 | B. | 乙数×3=甲数 | C. | 乙数÷3=甲数 | D. | 乙数×3=甲数 | ||||
| E. | 乙数×3=甲数 |
9.计算下面各题带★要验算.
| 840÷24= | 303÷60= | 298÷29= |
| ★490÷65= | 693÷33= | ★840÷70= |
7.列竖式计算:
0 137430 137438 137444 137448 137454 137456 137460 137466 137468 137474 137480 137484 137486 137490 137496 137498 137504 137508 137510 137514 137516 137520 137522 137524 137525 137526 137528 137529 137530 137532 137534 137538 137540 137544 137546 137550 137556 137558 137564 137568 137570 137574 137580 137586 137588 137594 137598 137600 137606 137610 137616 137624 199269
| 128×17= | 245×16= | 816×32= |
| 305×42= | 350×60= | 123×27= |