18.脱式计算.
0 159541 159549 159555 159559 159565 159567 159571 159577 159579 159585 159591 159595 159597 159601 159607 159609 159615 159619 159621 159625 159627 159631 159633 159635 159636 159637 159639 159640 159641 159643 159645 159649 159651 159655 159657 159661 159667 159669 159675 159679 159681 159685 159691 159697 159699 159705 159709 159711 159717 159721 159727 159735 199269
38+62×3 | 317-17×4 | (315-278)×5 |
25×7×4 | 250÷5-13 | 36×9×0 |