18．脱式计算．
0 161748 161756 161762 161766 161772 161774 161778 161784 161786 161792 161798 161802 161804 161808 161814 161816 161822 161826 161828 161832 161834 161838 161840 161842 161843 161844 161846 161847 161848 161850 161852 161856 161858 161862 161864 161868 161874 161876 161882 161886 161888 161892 161898 161904 161906 161912 161916 161918 161924 161928 161934 161942 199269
| ①（$\frac{4}{17}$-$\frac{1}{4}$+$\frac{2}{9}$）÷$\frac{5}{6}$ | ②3$\frac{3}{11}$×62.5%-1$\frac{4}{11}$×$\frac{5}{8}$+0.625 | ③$2006÷\frac{2007}{2008}$ |
| ④$\frac{9}{32}÷[{\frac{3}{4}-（{\frac{7}{16}-\frac{1}{4}}）}]$ | ⑤$24×\frac{51}{43}+51×\frac{19}{43}$ | ⑥$\frac{1}{2}$+$\frac{3}{10}$+$\frac{3}{40}$+$\frac{3}{88}$+…$\frac{3}{2350}$ |