2．列竖式计算（加减法要验算）
| 275+62= | 759+248= | 510-407= | 809-418= |
| 708×9= | 152×4= | 487×8= | 340×6= |
1．直接写出得数，我最棒．
0 159536 159544 159550 159554 159560 159562 159566 159572 159574 159580 159586 159590 159592 159596 159602 159604 159610 159614 159616 159620 159622 159626 159628 159630 159631 159632 159634 159635 159636 159638 159640 159644 159646 159650 159652 159656 159662 159664 159670 159674 159676 159680 159686 159692 159694 159700 159704 159706 159712 159716 159722 159730 199269
| 30×5= | 120×4= | 42÷6= | 530+70= |
| 320+450= | 700×0= | 101×7= | 31÷5= |
| 75+0= | 310-107= | 303×8≈ | 53×6≈ |
| 2100×4≈ | 81÷9= | 704-500= | $\frac{1}{5}$+$\frac{2}{5}$= |
| $\frac{1}{6}$+$\frac{5}{6}$= | $\frac{7}{8}$-$\frac{3}{8}$= | 1-$\frac{1}{4}$= | $\frac{1}{3}$+$\frac{2}{3}$= |
