| \( \frac {1}{4}\)+\( \frac {1}{3}\)÷\( \frac {2}{3}\) | \( \frac {5}{7}\)+\( \frac {7}{8}\)×\( \frac {5}{7}\)+\( \frac {3}{8}\) |
| \( \frac {5}{13}\)÷8+\( \frac {1}{8}\)×\( \frac {8}{13}\) | （\( \frac {1}{2}\)+\( \frac {2}{3}\)）÷5 |
| [\( \frac {1}{13}\)×（\( \frac {1}{5}\)+\( \frac {2}{3}\)）]÷\( \frac {1}{5}\)． |