1. 直接写出得数。(每题0.5分,共20分)
$540÷20=$ $\frac{5}{9}÷\frac{2}{5}=$ $\frac{5}{12}×\frac{3}{8}=$ $\frac{5}{8}×16=$
$2.5×40=$ $\frac{9}{7}÷\frac{3}{4}=$ $0.7÷\frac{1}{10}=$ $\frac{26}{33}÷\frac{2}{3}=$
$7.2+3.9=$ $\frac{1}{5}÷\frac{2}{9}=$ $\frac{3}{4}+\frac{5}{7}=$ $16÷\frac{1}{2}=$
$4.5-3.9=$ $60÷\frac{12}{9}=$ $\frac{3}{14}-\frac{3}{14}=$ $\frac{5}{9}×\frac{4}{7}=$
$240×10=$ $\frac{5}{6}÷\frac{5}{7}=$ $\frac{9}{5}×\frac{10}{17}=$ $\frac{5}{3}÷3=$
$5.4÷0.3=$ $1÷\frac{2}{9}=$ $\frac{5}{4}+\frac{3}{8}=$ $1-\frac{1}{15}=$
$100-36=$ $\frac{1}{3}÷\frac{3}{2}=$ $\frac{17}{32}÷\frac{17}{64}=$ $3÷\frac{1}{2}=$
$456+324=$ $\frac{5}{7}÷\frac{5}{6}=$ $\frac{3}{5}×\frac{1}{5}=$ $15×\frac{3}{5}=$
$8.5×20=$ $8÷\frac{1}{9}=$ $1-\frac{17}{30}=$ $9×\frac{2}{3}=$
$9÷4.5=$ $\frac{3}{2}÷\frac{5}{6}=$ $\frac{3}{5}÷6=$ $\frac{3}{5}÷\frac{1}{5}=$

1. $27$ $\frac{25}{18}$ $\frac{5}{32}$ $10$
$100$ $\frac{12}{7}$ $7$ $\frac{13}{11}$
$11.1$ $\frac{9}{10}$ $\frac{41}{28}$ $32$
$0.6$ $45$ $0$ $\frac{20}{63}$
$2400$ $\frac{7}{6}$ $\frac{18}{17}$ $\frac{5}{9}$
$18$ $\frac{9}{2}$ $\frac{13}{8}$ $\frac{14}{15}$
$64$ $\frac{2}{9}$ $2$ $6$
$780$ $\frac{6}{7}$ $\frac{3}{25}$ $9$
$170$ $72$ $\frac{13}{30}$ $6$
$2$ $\frac{9}{5}$ $\frac{1}{10}$ $3$

2. 计算下面各题。(每题4分,共24分)
$9.83 - (4.93 + 2\dfrac{1}{4})$
$24 ÷ (\dfrac{5}{12} - \dfrac{3}{8}) × \dfrac{1}{48}$
$\dfrac{3}{11} ÷ \dfrac{1}{67} - 3 ÷ 11$
$\dfrac{4}{9} ÷ [\dfrac{4}{5} - (\dfrac{1}{5} + \dfrac{1}{3})]$
$\dfrac{36}{41} ÷ \dfrac{4}{3} ÷ \dfrac{9}{4}$
$\dfrac{1}{7} × \dfrac{3}{4} + \dfrac{8}{7} × \dfrac{3}{4} - 0.75$

2. $\frac{53}{20}$ $12$ $18$
$\frac{5}{3}$ $\frac{12}{41}$ $\frac{3}{14}$