313.
1) \frac{11}{30} + \frac{4}{15} + \frac{4}{10} = \frac{11+8+9}{30} = \frac{28}{30}
2) \frac{17}{40} + \frac{9}{20} + \frac{1}{10} = \frac{17+18+4}{40} = \frac{39}{40}
3) \frac{2}{5} + \frac{3}{8} + \frac{7}{10} = \frac{16+15+28}{40} = 1\frac{19}{40}