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第2页

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$\frac{1}{4}$

$\frac{11}{30}$

$1\frac{5}{12}$

$\frac{2}{9}$

$2\frac{1}{3}$

$=\frac {7}{10}+\frac {1}{3}$

$=\frac {31}{30}$

$=\frac {6}{11}+\frac {5}{11}+\frac {1}{5}$

$=1+\frac {1}{5}$

$=1 \frac {1}{5}$

$=1-\frac {1}{8}-\frac {2}{5}$

$=\frac {7}{8}-\frac {2}{5}$

$=\frac {19}{40}$

$=\frac {11}{8}-(\frac {1}{6}+\frac {5}{6})$

$=\frac {11}{8}-1$

$=\frac {3}{8}$

$=(\frac {2}{5}+\frac {2}{5})+(\frac {4}{7}+\frac {3}{7})$

$=\frac {4}{5}+1$

$=1\frac 45$

$=\frac {7}{8}-\frac {1}{3}-\frac {1}{6}$

$=\frac {13}{24}-\frac {1}{6}$

$=\frac {3}{8}$