1. 直接写出得数。
$0.2 - \frac{1}{5} =$ $\frac{1}{2} + \frac{1}{5} =$ $\frac{13}{18} + \frac{7}{18} =$
$\frac{3}{2} - \frac{1}{2} =$ $\frac{7}{15} + \frac{8}{15} =$ $1 - \frac{3}{10} - \frac{3}{10} =$
$\frac{3}{4} - \frac{1}{2} =$ $\frac{1}{3} + \frac{1}{6} =$ $\frac{1}{7} - \frac{1}{9} =$
$\frac{2}{3} + \frac{1}{5} =$ $1 - \frac{9}{16} =$ $\frac{2}{9} + \frac{4}{9} =$
$\frac{1}{5} + \frac{1}{3} =$ $\frac{3}{4} - \frac{5}{8} =$ $\frac{8}{9} + \frac{4}{11} + \frac{1}{9} =$
$\frac{1}{5} - \frac{1}{7} =$ $\frac{3}{7} + \frac{1}{4} =$ $\frac{11}{8} - \frac{1}{8} =$
$1 - \frac{1}{6} - \frac{1}{6} =$ $\frac{7}{8} - \frac{3}{8} + \frac{3}{8} =$

2. 计算。（能简算的要简算。）
$\frac{4}{5} + (\frac{3}{8} - \frac{1}{4})$ $2 - \frac{3}{7} - \frac{4}{7}$
$\frac{5}{8} - \frac{1}{3} + \frac{5}{12}$ $\frac{1}{5} + \frac{1}{2} + \frac{1}{10}$
$\frac{5}{12} - (\frac{1}{2} - \frac{1}{12})$ $\frac{1}{6} + \frac{5}{6} + \frac{1}{6}$
$\frac{7}{12} + \frac{2}{5} + \frac{5}{12}$ $\frac{9}{10} - (\frac{2}{5} + \frac{1}{4})$
$\frac{9}{7} + \frac{1}{8} + \frac{5}{7} + \frac{3}{8}$ $\frac{7}{8} - \frac{4}{5} + \frac{9}{8} - \frac{1}{5}$
$\frac{4}{3} - \frac{1}{8} + \frac{7}{12}$ $\frac{5}{8} - (\frac{5}{8} - \frac{1}{2})$
$\frac{1}{12} + \frac{3}{8} + \frac{11}{12} + \frac{5}{8}$ $8 - \frac{9}{16} - \frac{7}{16}$
$\frac{7}{8} - \frac{3}{4} + \frac{1}{8}$ $\frac{2}{3} + (\frac{4}{17} + \frac{1}{3})$
$\frac{8}{9} + \frac{7}{15} + \frac{1}{9} - \frac{4}{15}$ $\frac{7}{12} - (\frac{3}{4} - \frac{1}{2})$