The numbers in order from least to greatest are:

• $-0.5$
• $\frac{1}{30} \approx 0.0333$
• $0.2$
• $\frac{3}{10} = 0.3$
• $1$

Would you like more details or have any other questions?

Here are 5 related questions for deeper practice:

1. How do you convert fractions to decimals?
2. What is the significance of negative numbers when ordering from least to greatest?
3. How can you compare rational numbers without converting them to decimals?
4. Why is it important to understand decimal approximations when comparing fractions?
5. How would you handle ordering numbers with repeating decimals?

Tip: When comparing fractions and decimals, converting everything to decimals makes it easier to visualize and compare values directly.