13.列竖式计算,打★的要求验算.
0 159533 159541 159547 159551 159557 159559 159563 159569 159571 159577 159583 159587 159589 159593 159599 159601 159607 159611 159613 159617 159619 159623 159625 159627 159628 159629 159631 159632 159633 159635 159637 159641 159643 159647 159649 159653 159659 159661 159667 159671 159673 159677 159683 159689 159691 159697 159701 159703 159709 159713 159719 159727 199269
1900×3= | 51÷7= | 605×7= |
496×7= | ★506-209= | ★310+791= |