6．下面各题，怎样简便就怎样算．
0 164597 164605 164611 164615 164621 164623 164627 164633 164635 164641 164647 164651 164653 164657 164663 164665 164671 164675 164677 164681 164683 164687 164689 164691 164692 164693 164695 164696 164697 164699 164701 164705 164707 164711 164713 164717 164723 164725 164731 164735 164737 164741 164747 164753 164755 164761 164765 164767 164773 164777 164783 164791 199269
| 4.3+0.98+0.7 | 4.05÷0.81+2.4 | 0.25×16.2×4 |
| （3.24+2.6）×（1-0.75） | 13.6×0.5-3.6÷2 | 56.5×99+56.5 |