1. **State the problem:** We need to find which expressions are less than $$\frac{3}{5} \div 12$$. 2. **Calculate the value of $$\frac{3}{5} \div 12$$:** $$\frac{3}{5} \div 12 = \frac{3}{5} \times \frac{1}{12} = \frac{3 \times 1}{5 \times 12} = \frac{3}{60} = \frac{1}{20}$$ So, the value to compare with is $$\frac{1}{20}$$. 3. **Evaluate each expression and compare to $$\frac{1}{20}$$:** - $$\frac{3}{5} \div \frac{7}{10} = \frac{3}{5} \times \frac{10}{7} = \frac{30}{35} = \frac{6}{7} \approx 0.857 > \frac{1}{20}$$ (Not less) - $$\frac{3}{5} \div \frac{1}{5} = \frac{3}{5} \times 5 = 3 > \frac{1}{20}$$ (Not less) - $$\frac{3}{5} \div \frac{3}{4} = \frac{3}{5} \times \frac{4}{3} = \frac{12}{15} = \frac{4}{5} = 0.8 > \frac{1}{20}$$ (Not less) - $$\frac{3}{5} \div \frac{1}{2} = \frac{3}{5} \times 2 = \frac{6}{5} = 1.2 > \frac{1}{20}$$ (Not less) 4. **Conclusion:** None of the given expressions are less than $$\frac{1}{20}$$. **Final answer:** No expressions are less than $$\frac{3}{5} \div 12$$.