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答案：
$\frac{1}{3}× \frac{1}{2}= \frac{1}{6}$
$\frac{2}{3}× \frac{1}{3}= \frac{2}{9}$
$\frac{1}{2}× \frac{4}{5}= \frac{2}{5}$
$\frac{3}{4}× \frac{2}{3}= \frac{1}{2}$
$\frac{2}{3}× \frac{1}{2}= \frac{1}{3}$
$\frac{4}{5}× \frac{3}{4}= \frac{3}{5}$
$\frac{2}{3}× \frac{1}{3}= \frac{2}{9}$
$\frac{1}{2}× \frac{4}{5}= \frac{2}{5}$
$\frac{3}{4}× \frac{2}{3}= \frac{1}{2}$
$\frac{2}{3}× \frac{1}{2}= \frac{1}{3}$
$\frac{4}{5}× \frac{3}{4}= \frac{3}{5}$
$\frac{5}{6}-\frac{1}{2}=$
$\frac{5}{9}× \frac{5}{6}=$
$1-\frac{4}{7}=$
$\frac{5}{6}× \frac{3}{4}=$
$\frac{1}{3}+\frac{1}{3}=$
$\frac{7}{9}× \frac{2}{5}=$
$\frac{7}{8}+\frac{1}{2}=$
$\frac{8}{9}× \frac{2}{3}=$
$\frac{1}{6}× \frac{5}{6}=$
$\frac{3}{25}× \frac{3}{4}=$
$\frac{5}{7}× \frac{2}{9}=$
$\frac{2}{7}× \frac{3}{7}=$
$\frac{2}{5}× \frac{2}{9}=$
$\frac{4}{21}× \frac{2}{3}=$
$\frac{3}{5}+1=$
$\frac{1}{4}× \frac{3}{4}=$
$\frac{3}{8}× \frac{4}{5}=$
$\frac{5}{14}× \frac{3}{9}=$
$\frac{4}{5}+\frac{2}{3}=$
$\frac{5}{6}+6=$
$\frac{3}{4}+\frac{1}{2}=$
$\frac{1}{3}$
$\frac{5}{9}× \frac{5}{6}=$
$\frac{25}{54}$
$1-\frac{4}{7}=$
$\frac{3}{7}$
$\frac{5}{6}× \frac{3}{4}=$
$\frac{5}{8}$
$\frac{1}{3}+\frac{1}{3}=$
$\frac{2}{3}$
$\frac{7}{9}× \frac{2}{5}=$
$\frac{14}{45}$
$\frac{7}{8}+\frac{1}{2}=$
$\frac{11}{8}$
$\frac{8}{9}× \frac{2}{3}=$
$\frac{16}{27}$
$\frac{1}{6}× \frac{5}{6}=$
$\frac{5}{36}$
$\frac{3}{25}× \frac{3}{4}=$
$\frac{9}{100}$
$\frac{5}{7}× \frac{2}{9}=$
$\frac{10}{63}$
$\frac{2}{7}× \frac{3}{7}=$
$\frac{6}{49}$
$\frac{2}{5}× \frac{2}{9}=$
$\frac{4}{45}$
$\frac{4}{21}× \frac{2}{3}=$
$\frac{8}{63}$
$\frac{3}{5}+1=$
$1\frac{3}{5}$
$\frac{1}{4}× \frac{3}{4}=$
$\frac{3}{16}$
$\frac{3}{8}× \frac{4}{5}=$
$\frac{3}{10}$
$\frac{5}{14}× \frac{3}{9}=$
$\frac{5}{42}$
$\frac{4}{5}+\frac{2}{3}=$
$\frac{22}{15}$
$\frac{5}{6}+6=$
$6\frac{5}{6}$
$\frac{3}{4}+\frac{1}{2}=$
$\frac{5}{4}$
答案：
$\frac{5}{6}-\frac{1}{2}=\frac{5}{6}-\frac{3}{6}=\frac{2}{6}=\frac{1}{3}$
$\frac{5}{9}× \frac{5}{6}=\frac{25}{54}$
$1-\frac{4}{7}=\frac{3}{7}$
$\frac{5}{6}× \frac{3}{4}=\frac{15}{24}=\frac{5}{8}$
$\frac{1}{3}+\frac{1}{3}=\frac{2}{3}$
$\frac{7}{9}× \frac{2}{5}=\frac{14}{45}$
$\frac{7}{8}+\frac{1}{2}=\frac{7}{8}+\frac{4}{8}=\frac{11}{8}$
$\frac{8}{9}× \frac{2}{3}=\frac{16}{27}$
$\frac{1}{6}× \frac{5}{6}=\frac{5}{36}$
$\frac{3}{25}× \frac{3}{4}=\frac{9}{100}$
$\frac{5}{7}× \frac{2}{9}=\frac{10}{63}$
$\frac{2}{7}× \frac{3}{7}=\frac{6}{49}$
$\frac{2}{5}× \frac{2}{9}=\frac{4}{45}$
$\frac{4}{21}× \frac{2}{3}=\frac{8}{63}$
$\frac{3}{5}+1=1\frac{3}{5}$
$\frac{1}{4}× \frac{3}{4}=\frac{3}{16}$
$\frac{3}{8}× \frac{4}{5}=\frac{12}{40}=\frac{3}{10}$
$\frac{5}{14}× \frac{3}{9}=\frac{15}{126}=\frac{5}{42}$
$\frac{4}{5}+\frac{2}{3}=\frac{12}{15}+\frac{10}{15}=\frac{22}{15}$
$\frac{5}{6}+6=6\frac{5}{6}$
$\frac{3}{4}+\frac{1}{2}=\frac{3}{4}+\frac{2}{4}=\frac{5}{4}$
$\frac{5}{9}× \frac{5}{6}=\frac{25}{54}$
$1-\frac{4}{7}=\frac{3}{7}$
$\frac{5}{6}× \frac{3}{4}=\frac{15}{24}=\frac{5}{8}$
$\frac{1}{3}+\frac{1}{3}=\frac{2}{3}$
$\frac{7}{9}× \frac{2}{5}=\frac{14}{45}$
$\frac{7}{8}+\frac{1}{2}=\frac{7}{8}+\frac{4}{8}=\frac{11}{8}$
$\frac{8}{9}× \frac{2}{3}=\frac{16}{27}$
$\frac{1}{6}× \frac{5}{6}=\frac{5}{36}$
$\frac{3}{25}× \frac{3}{4}=\frac{9}{100}$
$\frac{5}{7}× \frac{2}{9}=\frac{10}{63}$
$\frac{2}{7}× \frac{3}{7}=\frac{6}{49}$
$\frac{2}{5}× \frac{2}{9}=\frac{4}{45}$
$\frac{4}{21}× \frac{2}{3}=\frac{8}{63}$
$\frac{3}{5}+1=1\frac{3}{5}$
$\frac{1}{4}× \frac{3}{4}=\frac{3}{16}$
$\frac{3}{8}× \frac{4}{5}=\frac{12}{40}=\frac{3}{10}$
$\frac{5}{14}× \frac{3}{9}=\frac{15}{126}=\frac{5}{42}$
$\frac{4}{5}+\frac{2}{3}=\frac{12}{15}+\frac{10}{15}=\frac{22}{15}$
$\frac{5}{6}+6=6\frac{5}{6}$
$\frac{3}{4}+\frac{1}{2}=\frac{3}{4}+\frac{2}{4}=\frac{5}{4}$
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