一、口算。
$\frac{5}{6}+\frac{1}{4}=$ $0.36\div1.2=$ $\frac{5}{14}-\frac{5}{28}=$
$\frac{3}{4}\times\frac{8}{33}=$ $5.5 + 0.45=$ $5\div5\%=$
$3-\frac{2}{9}=$ $0.25\times800=$ $\frac{1}{11}+\frac{3}{22}=$
$\frac{3}{4}+\frac{3}{7}=$ $3\div0.15=$ $6.3 - 1.09=$
$7.5 - 2.9=$ $\frac{5}{12}\times\frac{7}{10}=$ $0.95\div19=$
$4.2\div1.4=$ $\frac{7}{9}+\frac{1}{3}=$ $\frac{5}{11}\times\frac{33}{35}=$
$40\times25\%=$ $7 - 0.98=$ $38\div\frac{19}{20}=$
$\frac{4}{7}+\frac{4}{7}=$ $4\div30\%=$ $3.76 + 0.34=$
$\frac{2}{7}\times\frac{7}{8}=$ $\frac{6}{7}+\frac{2}{21}=$ $\frac{6}{7}\times\frac{5}{9}=$
$\frac{9}{16}\div\frac{3}{8}=$ $\frac{1}{3}\times\frac{3}{10}=$ $\frac{1}{5}-\frac{1}{7}=$

$\frac{13}{12}$ 0.3 $\frac{5}{28}$ $\frac{2}{11}$ 5.95 100 $2\frac{7}{9}$ 200 $\frac{5}{22}$ $\frac{33}{28}$ 20 5.21 4.6 $\frac{7}{24}$ 0.05 3 $\frac{10}{9}$ $\frac{3}{7}$ 10 6.02 40 $\frac{8}{7}$ $\frac{40}{3}$ 4.1 $\frac{1}{4}$ $\frac{20}{21}$ $\frac{10}{21}$ $\frac{3}{2}$ $\frac{1}{10}$ $\frac{2}{35}$

二、计算下面各题，怎样简便就怎样计算。
$(\frac{1}{4}+\frac{2}{3})\div\frac{1}{24}$ $4\div50\%-25\%\times40\%$ $7.38-(1.42 + 2.58 + 0.38)$

22 7.9 3