2．计算下面各题，能简便的要简便．
0 158646 158654 158660 158664 158670 158672 158676 158682 158684 158690 158696 158700 158702 158706 158712 158714 158720 158724 158726 158730 158732 158736 158738 158740 158741 158742 158744 158745 158746 158748 158750 158754 158756 158760 158762 158766 158772 158774 158780 158784 158786 158790 158796 158802 158804 158810 158814 158816 158822 158826 158832 158840 199269
| 3786-499 | 31.25÷$\frac{1}{4}$×0.25 | （$\frac{1}{3}$+$\frac{1}{4}$-$\frac{1}{8}$）×24 |
| 67×$\frac{65}{66}$ | （$\frac{3}{5}$+2.4÷$\frac{8}{3}$）×2.5 | 25×32×125 |