15.一根绳子长1.8米,另一根绳子长1.5米,把两根绳子接在一起后的长度是3米,接头处是( )米.
0 157417 157425 157431 157435 157441 157443 157447 157453 157455 157461 157467 157471 157473 157477 157483 157485 157491 157495 157497 157501 157503 157507 157509 157511 157512 157513 157515 157516 157517 157519 157521 157525 157527 157531 157533 157537 157543 157545 157551 157555 157557 157561 157567 157573 157575 157581 157585 157587 157593 157597 157603 157611 199269
A. | 0.3 | B. | 1.3 | C. | 2.3 |