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第13页

信息发布者：

$\frac{4}{9}$

$\frac{3}{10}$

$\frac{13}{8}$

$\frac{18}{35}$

$\frac{3}{8}$

$\frac{1}{30}$

$\frac{9}{10}$

解$：x=\frac {3}{8}+\frac {5}{6}$

$x=\frac {9}{24}+\frac {20}{24}$

$ x = \frac {29}{24}$

解$：x=2.5×12$

$x = 30$

解$：6x-1.2=10.8$

$6x=12$

$x = 2$

$=\frac {16}{18}-\frac {15}{18}+\frac {12}{18}$

$=\frac {1}{18}+\frac {12}{18}$

$= \frac {13}{18}$

$=\frac {5}{8}+\frac {3}{8}-\frac {1}{3}$

$=1-\frac {1}{3}$

$= \frac {2}{3}$

$=(\frac {8}{9}+\frac {1}{9})-(\frac {5}{7}+\frac {1}{7})$

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

$= \frac {1}{7}$

$=\frac {7}{11}+\frac {4}{11}-\frac {2}{5}$

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

$= \frac {3}{5}$

$=(\frac {6}{5}+\frac {4}{5})+(\frac {5}{7}+\frac {2}{7})$

$=2+1$

$= 3$

$=\frac {5}{3}-(\frac {4}{9}+\frac {5}{9})$

$=\frac {5}{3}-1$

= $\frac{2}{3}$

0.67

$\frac{1}{6}$

$\frac{3}{10}$

$\frac{3}{4}$

$\frac{1}{8}$

$\frac{2}{3}$