To solve \(3.9 \div \frac{1}{3}\):

Dividing by a fraction is equivalent to multiplying by its reciprocal:

\[
3.9 \div \frac{1}{3} = 3.9 \times 3 = 11.7
\]

Thus, \(3.9 \div \frac{1}{3} = 11.7\).

Would you like further details or have any questions?

Here are some related questions to explore:
1. What is \(7.8 \div \frac{1}{2}\)?
2. How do you divide two fractions?
3. What happens when you multiply by a fraction less than 1?
4. What is the decimal equivalent of \( \frac{1}{3} \)?
5. How do you convert a mixed number into an improper fraction?

**Tip:** When dividing by a fraction, always multiply by its reciprocal for easier calculations.

Learn how to divide 3.9 by 1/3 with a clear, step-by-step solution. This problem involves dividing by a fraction and multiplying by its reciprocal. Suitable for students in Grades 5-6.

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