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### 13. **Multiplicative inverse of \( -\frac{1}{4} \)**

The multiplicative inverse of a number \( x \) is the number that, when multiplied by \( x \), gives 1. For fractions, the multiplicative inverse is simply the reciprocal.

For \( -\frac{1}{4} \), the reciprocal is \( -4 \), because:

\[
-\frac{1}{4} \times (-4) = 1
\]

Thus, the multiplicative inverse of \( -\frac{1}{4} \) is \( -4 \).

### 14. **Multiplicative inverse of \( \pi \)**

The multiplicative inverse of \( \pi \) is \( \frac{1}{\pi} \), because:

\[
\pi \times \frac{1}{\pi} = 1
\]

So, the multiplicative inverse of \( \pi \) is \( \frac{1}{\pi} \).

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### Related Questions:
1. What is the multiplicative inverse of \( \frac{2}{3} \)?
2. What happens if we multiply a number by its additive inverse?
3. How does the multiplicative inverse behave for irrational numbers like \( e \)?
4. Can you explain how to find the multiplicative inverse of a decimal?
5. What is the multiplicative inverse of \( -\frac{2}{5} \)?

### Tip:
Always remember, the multiplicative inverse is also called the "reciprocal" of a number. It applies to all non-zero numbers, but zero doesn't have a multiplicative inverse!

Find the multiplicative inverse of -1/4 and π.

Learn how to calculate the multiplicative inverse (reciprocal) of -1/4 and π with simple steps. This guide breaks down the process for students in Grades 7-10, covering key mathematical concepts like reciprocals.

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