好学生暑假生活·数学五年级 JJ
$\frac{3}{4}×12=$
$\frac{5}{12}×\frac{3}{4}=$
$60×\frac{1}{12}=$
$\frac{3}{4}+\frac{2}{3}=$
$\frac{2}{9}×\frac{3}{20}=$
$\frac{5}{6}÷\frac{1}{4}=$

9 $\frac{5}{16}$ 5 $1\frac{5}{12}$ $\frac{1}{30}$ $3\frac{1}{3}$

2. 计算下面各题,怎样算简便就怎样算。
$3 ÷ \frac{3}{4} - \frac{3}{4} ÷ 3$
$\frac{7}{8} × \frac{5}{6} × \frac{9}{10}$
$\frac{8}{9} × \frac{2}{7} ÷ \frac{8}{3}$
$( \frac{1}{6} + \frac{1}{8} ) × 2$
$\frac{1}{7} × \frac{5}{13} + \frac{8}{13} × \frac{1}{7}$
$15 ÷ \frac{9}{10} × \frac{3}{5}$
$\frac{7}{12} + \frac{2}{7} - \frac{7}{12}$
$\frac{5}{9} + \frac{6}{7} + ( \frac{4}{9} - \frac{6}{7} )$
$6 - \frac{3}{8} - \frac{5}{8}$
$\frac{11}{15} + \frac{5}{17} + \frac{4}{15} + \frac{12}{17}$
$\frac{2}{5} ÷ \frac{7}{10} + \frac{1}{4} ÷ \frac{1}{2}$
$\frac{4}{59} ÷ ( \frac{7}{18} + \frac{1}{2} )$

$3\frac{3}{4}$ $\frac{21}{32}$ $\frac{2}{21}$ $\frac{7}{12}$ $\frac{1}{7}$ 10 $\frac{2}{7}$ 1 5 2 $\frac{15}{14}$ $\frac{9}{118}$