1.直接写出得数。
$42×\frac{6}{7}=$
$\frac{8}{9}÷2=$
$2.4×\frac{5}{6}=$
$15÷\frac{3}{5}=$
$\frac{11}{12}×\frac{4}{33}=$
$\frac{3}{10}÷\frac{9}{25}=$
$0.75÷\frac{3}{4}=$
$\frac{4}{9}÷\frac{3}{2}=$

1. 36 $\frac{4}{9}$ 2 25 $\frac{1}{9}$ $\frac{5}{6}$ 1 $\frac{8}{27}$

2.计算下面各题,能简算的要简算。
$4.8 + 3.2 × \frac{3}{8}$
$22 ÷ ( \frac{3}{8} + \frac{1}{12} )$
$0.45 × \frac{5}{9} + \frac{11}{20} ÷ \frac{9}{5}$
$\frac{4}{9} × \frac{2}{5} ÷ \frac{4}{9} × \frac{2}{5}$
$\frac{8}{9} ÷ ( \frac{5}{6} - \frac{1}{2} ) × \frac{1}{16}$
$( \frac{1}{4} - \frac{1}{6} + \frac{5}{12} ) × 36$

2.(过程略)6 48 $\frac{5}{9}$ $\frac{4}{25}$ $\frac{1}{6}$ 18