17.一箱芒果,连箱子共重25千克,恰好卖掉一半后,连箱子还重14千克.这箱芒果净重多少千克?正确的算式是( )
| A. | 25-14 | B. | 14×2 | C. | 25-14×2 | D. | (25-14)×2 |
15.今年的上半年比下半年少( )天.
0 136419 136427 136433 136437 136443 136445 136449 136455 136457 136463 136469 136473 136475 136479 136485 136487 136493 136497 136499 136503 136505 136509 136511 136513 136514 136515 136517 136518 136519 136521 136523 136527 136529 136533 136535 136539 136545 136547 136553 136557 136559 136563 136569 136575 136577 136583 136587 136589 136595 136599 136605 136613 199269
| A. | 1 | B. | 2 | C. | 3 | D. | 2或3 |