一、直接写得数。（6分）
$\frac{11}{24} × 21 =$
$\frac{25}{24} × \frac{16}{15} =$
$9.6 × \frac{5}{24} =$
$\frac{5}{8} ÷ 15 =$
$\frac{25}{21} ÷ 5 =$
$17 × \frac{7}{25} × \frac{11}{17} =$
$0.34 + 66\% =$
$10\% × 25 =$
$50 ÷ 1\% =$
$\frac{12}{35} ÷ 24\% × 0 =$
$80 × (1 + 20\%) =$
$1 - 27\% =$

$\frac{77}{8}$ $\frac{10}{9}$ 2 $\frac{1}{24}$ $\frac{5}{21}$ $\frac{77}{25}$ 1 2.5 5000 0 96 73%(或0.73)

二、用自己喜欢的方法计算。(36分)
$\frac{14}{17} × \frac{3}{4} + \frac{14}{17} × \frac{1}{4}$
$( \frac{5}{9} + \frac{1}{25} ) × 9 + \frac{16}{25}$
$\frac{1}{12} ÷ \frac{3}{4} + \frac{11}{12} × \frac{4}{3}$
$( \frac{1}{3} + \frac{1}{4} - \frac{1}{2} ) ÷ \frac{1}{12}$
$23 × \frac{9}{22}$
$\frac{3}{25} × 101 - \frac{3}{25}$
$\frac{5}{6} × \frac{3}{4} + \frac{5}{6} × \frac{1}{4}$
$( \frac{4}{5} - \frac{1}{2} ) ÷ \frac{3}{10} × \frac{2}{3}$
$\frac{7}{8} ÷ [ \frac{2}{3} × ( \frac{1}{2} + \frac{1}{4} ) ]$
$\frac{17}{36} ÷ ( \frac{5}{6} + \frac{7}{12} )$
$( \frac{3}{4} - \frac{2}{5} ) × 40$
$\frac{5}{9} ÷ \frac{3}{8} × \frac{27}{10}$

$\frac{14}{17}$ 6 $\frac{4}{3}$ 1 $9\frac{9}{22}$ 12 $\frac{5}{6}$ $\frac{2}{3}$ $\frac{7}{4}$ $\frac{1}{3}$ 14 4