1. 直接写出得数。
实际用时：分钟
$100÷20=$
$90÷45\%=$
$\frac{9}{19}+\frac{3}{19}=$
$\frac{7}{8}-(\frac{5}{6}-\frac{1}{8})=$
$3.5×0.2=$
$80\%×110=$
$\frac{35}{16}×\frac{8}{7}=$
$\frac{7}{9}×\frac{5}{6}×\frac{18}{7}=$
$3.68+2.32=$
$110\%-10\%=$
$\frac{16}{23}÷2=$
$\frac{7}{11}÷\frac{5}{13}×0=$
$240×10=$
$140\%+60\%=$
$\frac{3}{10}-\frac{1}{50}=$
$24×(\frac{1}{3}-\frac{1}{8})=$
$7.7÷1.1=$
$450×10\%=$
$\frac{5}{8}×\frac{4}{3}=$
$\frac{7}{10}-\frac{5}{8}+\frac{3}{10}=$
$24÷48=$
$80×40\%=$
$\frac{5}{6}+\frac{4}{9}=$
$\frac{9}{10}÷5÷\frac{1}{5}=$
$485+199=$
$24\%×200=$
$\frac{17}{9}÷\frac{17}{5}=$
$\frac{1}{2}÷4-\frac{1}{8}=$
$1-0.24=$
$45\%×100=$
$\frac{3}{5}-\frac{2}{15}=$
$\frac{7}{8}-\frac{1}{2}×\frac{3}{4}=$
$25×0.1=$
$4.5÷0.15=$
$\frac{8}{7}÷4=$
$\frac{7}{10}+\frac{1}{5}+\frac{1}{10}=$
$6.8+3.1=$
$0.56-0.39=$
$25×\frac{1}{50}=$
$\frac{18}{19}×\frac{1}{2}-\frac{3}{19}=$

1. $5$　$200$　$\frac{12}{19}$　$\frac{1}{6}$
$0.7$　$88$　$\frac{5}{2}$　$\frac{5}{3}$
$6$　$100\%$　$\frac{8}{23}$　$0$
$2400$　$200\%$　$\frac{7}{25}$　$5$
$7$　$45$　$\frac{5}{6}$　$\frac{3}{8}$
$\frac{1}{2}$　$32$　$\frac{23}{18}$　$\frac{9}{10}$
$684$　$48$　$\frac{5}{9}$　$0$
$0.76$　$45$　$\frac{7}{15}$　$\frac{1}{2}$
$2.5$　$30$　$\frac{2}{7}$　$1$
$9.9$　$0.17$　$\frac{1}{2}$　$\frac{6}{19}$

2. 计算下面各题。
$\frac{7}{10} × 91$
$33 × 75\% + 66 × \frac{3}{4} + 0.75$
$\frac{29}{17} + 3.49 - ( \frac{12}{17} - 0.51 )$
$3 × \frac{2}{9} + 5 × \frac{2}{9} + \frac{2}{9}$
$11 × ( \frac{2}{11} + \frac{1}{13} ) × 13$
$0.55 × 18 + 83 × 55\% - \frac{11}{20}$

2. $\frac{637}{10}$　$75$　$5$
$2$　$37$　$55$