1．口算
0 159557 159565 159571 159575 159581 159583 159587 159593 159595 159601 159607 159611 159613 159617 159623 159625 159631 159635 159637 159641 159643 159647 159649 159651 159652 159653 159655 159656 159657 159659 159661 159665 159667 159671 159673 159677 159683 159685 159691 159695 159697 159701 159707 159713 159715 159721 159725 159727 159733 159737 159743 159751 199269
| 701-107= | 400×50= | 67×11= | 43×5-3×5= |
| 1000÷8= | 90-80÷10= | 730÷90= | 672+238-238= |