1. 直接写出得数。
实际用时：分钟
$\frac{5}{42}+\frac{3}{7}=$
$\frac{13}{16}-\frac{3}{4}=$
$4.4×\frac{5}{22}=$
$4.8÷\frac{12}{25}=$
$\frac{7}{8}+\frac{3}{40}=$
$\frac{7}{9}-\frac{2}{3}=$
$\frac{7}{25}×\frac{5}{14}=$
$\frac{5}{21}÷\frac{5}{9}=$
$\frac{7}{50}+\frac{3}{25}=$
$3-\frac{2}{3}=$
$\frac{8}{33}×\frac{11}{16}=$
$\frac{25}{11}÷\frac{5}{11}=$
$0.25+\frac{3}{4}=$
$\frac{7}{5}-0.4=$
$\frac{7}{12}×36=$
$\frac{25}{24}÷5=$
$\frac{7}{15}+\frac{3}{5}=$
$\frac{11}{6}-1=$
$1×\frac{9}{11}=$
$\frac{5}{13}÷1=$
$\frac{11}{6}+\frac{1}{6}=$
$\frac{7}{8}-\frac{3}{5}=$
$\frac{5}{8}×\frac{5}{11}=$
$\frac{1}{3}÷\frac{5}{9}=$
$\frac{5}{6}+\frac{7}{30}=$
$\frac{8}{9}-\frac{5}{6}=$
$\frac{21}{32}×\frac{16}{7}=$
$9÷\frac{18}{7}=$
$\frac{5}{6}+\frac{7}{36}=$
$\frac{7}{38}-\frac{2}{19}=$
$2.5×\frac{7}{10}=$
$3.6÷\frac{9}{5}=$
$\frac{1}{5}+\frac{7}{10}=$
$1-\frac{5}{6}=$
$\frac{5}{32}×32=$
$21÷\frac{21}{8}=$
$\frac{1}{2}+\frac{7}{12}=$
$\frac{1}{3}-\frac{1}{6}=$
$64×\frac{5}{32}=$
$\frac{9}{8}÷3=$

1. $\frac{23}{42}$ $\frac{1}{16}$ $1$ $10$
$\frac{19}{20}$ $\frac{1}{9}$ $\frac{1}{10}$ $\frac{3}{7}$
$\frac{13}{50}$ $\frac{7}{3}$ $\frac{1}{6}$ $5$
$1$ $1$ $21$ $\frac{5}{24}$
$\frac{16}{15}$ $\frac{5}{6}$ $\frac{9}{11}$ $\frac{5}{13}$
$2$ $\frac{11}{40}$ $\frac{25}{88}$ $\frac{3}{5}$
$\frac{16}{15}$ $\frac{1}{18}$ $\frac{3}{2}$ $\frac{7}{2}$
$\frac{37}{36}$ $\frac{3}{38}$ $\frac{7}{4}$ $2$
$\frac{9}{10}$ $\frac{1}{6}$ $5$ $8$
$\frac{13}{12}$ $\frac{1}{6}$ $10$ $\frac{3}{8}$

2. 计算下面各题。
$36×( \dfrac{3}{4} + \dfrac{5}{12} - \dfrac{2}{3} )$
$\dfrac{7}{38} ÷ \dfrac{2}{19} × \dfrac{5}{14}$
$( \dfrac{19}{25} × 8 - \dfrac{17}{25} × 8 ) ÷ \dfrac{16}{9}$
$[ \dfrac{1}{3} ÷ ( \dfrac{7}{4} - \dfrac{2}{3} ) ] × \dfrac{13}{8}$
$5.6 × ( \dfrac{5}{7} - \dfrac{3}{8} )$
$\dfrac{23}{24} × 25$

2. $18$ $\frac{5}{8}$ $\frac{9}{25}$
$\frac{1}{2}$ $\frac{19}{10}$ $\frac{575}{24}$