2．竖式计算，最后两条验算
| 238÷6= | 420÷3= | 185÷5= | 100÷7= |
| 832÷4= | 309÷3= | 403÷8= | 517÷5= |
1．直接写得数．
| 600÷2= | 700÷7= | 13×0= | 0÷8= |
| 5×40= | 120-70= | 99÷9= | 400÷4= |
| 252÷5≈ | 138÷7≈ | 358÷6≈ | 244÷3≈ |
| 321÷4≈ | 484÷6≈ | 83÷2≈ | 543÷9≈ |
17．直接写得数
0 154461 154469 154475 154479 154485 154487 154491 154497 154499 154505 154511 154515 154517 154521 154527 154529 154535 154539 154541 154545 154547 154551 154553 154555 154556 154557 154559 154560 154561 154563 154565 154569 154571 154575 154577 154581 154587 154589 154595 154599 154601 154605 154611 154617 154619 154625 154629 154631 154637 154641 154647 154655 199269
| $\frac{3}{4}$×16= | 12÷$\frac{3}{5}$= | $\frac{3}{5}$×$\frac{5}{6}$= | 1÷$\frac{7}{8}$= | $\frac{3}{5}$÷$\frac{9}{10}$= |
| $\frac{5}{7}$÷$\frac{5}{7}$= | 48×$\frac{5}{8}$= | $\frac{5}{42}$÷$\frac{5}{7}$= | 0.375×8= | $\frac{1}{2}$×$\frac{1}{3}$÷$\frac{1}{2}$×$\frac{1}{3}$= |