2．计算
0 159602 159610 159616 159620 159626 159628 159632 159638 159640 159646 159652 159656 159658 159662 159668 159670 159676 159680 159682 159686 159688 159692 159694 159696 159697 159698 159700 159701 159702 159704 159706 159710 159712 159716 159718 159722 159728 159730 159736 159740 159742 159746 159752 159758 159760 159766 159770 159772 159778 159782 159788 159796 199269
| $\frac{5}{7}$÷10= | $\frac{3}{5}$×6= | 98×$\frac{4}{7}$= |
| $\frac{14}{15}$×$\frac{7}{12}$= | $\frac{24}{25}$÷$\frac{7}{8}$= | $\frac{4}{21}$÷$\frac{2}{7}$= |