1. $\frac{1}{3} + \frac{2}{5} = \frac{5}{15} + \frac{6}{15} = \frac{11}{15}$
2. $\frac{3}{8} = \frac{9}{24} = 15 \div 40$
3. $8 \times \frac{1}{9} - 2 \times \frac{1}{9} = 6 \times \frac{1}{9} = \frac{6}{9} = \frac{2}{3}$
4. $\frac{5}{6} + \frac{2}{3} = \frac{5}{6} + \frac{4}{6} = \frac{9}{6} = \frac{3}{2}$
5. $\frac{3}{1} + \frac{5}{6} + \frac{2}{3} = \frac{18}{6} + \frac{5}{6} + \frac{4}{6} = \frac{27}{6} = \frac{9}{2}$
6. $4 \text{米} - \frac{1}{4} \times 4 \text{米} - \frac{2}{1} \times 4 \text{米} = 4 \text{米} - 1 \text{米} - 8 \text{米} = -5 \text{米}$
7. $\frac{1}{3} + \frac{2}{5} - \frac{1}{4} = \frac{20}{60} + \frac{24}{60} - \frac{15}{60} = \frac{29}{60}$
8. $\frac{7}{8} + \frac{1}{8} = 1$
9. $\frac{5}{6} + 2 \times \frac{1}{6} = \frac{5}{6} + \frac{2}{6} = \frac{7}{6} = 1 \frac{1}{6}$
10. $\frac{5}{6} - 3 \times \frac{1}{6} = \frac{5}{6} - \frac{3}{6} = \frac{2}{6} = \frac{1}{3}$
这些题目涵盖了带分数加减法的各种情况，包括同分母和异分母的分数加减、分数与整数的加减、以及分数的约分等。通过这些题目，可以巩固带分数加减法的计算技巧。