18．用竖式计算．（除不尽的保留两位小数）
| 3.02×4.8 | 7.21÷0.89 | 0.94×0.65 | 5+16.2 |
| 2.06×120 | 8.49÷4.9 | 36.1÷0.58 | 8.04-3.084 |
17．直接写出得数．
0 164657 164665 164671 164675 164681 164683 164687 164693 164695 164701 164707 164711 164713 164717 164723 164725 164731 164735 164737 164741 164743 164747 164749 164751 164752 164753 164755 164756 164757 164759 164761 164765 164767 164771 164773 164777 164783 164785 164791 164795 164797 164801 164807 164813 164815 164821 164825 164827 164833 164837 164843 164851 199269
| 3.2×2= | 0.2×1.3= | 0.05×1.2= | 0.6÷0.3= | 5.46×0= |
| 2.5÷0.5= | 1.6÷0.5= | 0.8×1.2= | 0.63÷0.7= | 8-3.54= |
