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It looks like the page contains mathematical exercises with instructions in French. Here's a breakdown of the visible tasks:

1. **Exercises 25-28**: These exercises ask to "déterminer la nature de chaque nombre," meaning "determine the nature of each number." Likely, the goal is to identify whether the numbers are rational, irrational, integers, or real numbers.

   - **Exercise 25**: Identify the type of numbers: \( \frac{4}{81}, \frac{15}{2}, \frac{14.7}{2}, \frac{3}{1} \).
   - **Exercise 26**: Numbers are presented as powers and decimals: \( 4 + 5, 10^{-5}, 1.78 \).
   - **Exercise 27**: \( 3.200, 31, 1.3, \frac{13}{14} \).
   - **Exercise 28**: \( 3.65, 3.6565, 0.34543 \dots \), implying possibly repeating decimals.

2. **Exercise 29**: It looks like you need to compare two lists of numbers. List 1 contains values like \( 0.166 \dots, 1, 1001, 9990 \), while List 2 has values like \( 1, 1, 577, 50 \), etc.

Would you like me to work on a specific exercise or explain something in more detail? Let me know how you'd like to proceed.

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Here are 5 follow-up questions related to this material:

1. How do we classify numbers such as fractions, repeating decimals, and powers of 10?
2. What is the difference between rational and irrational numbers?
3. Can every decimal number be written as a fraction?
4. How do you identify the nature of a repeating decimal like \( 0.34543 \dots \)?
5. Why is \( \frac{3}{1} \) considered an integer?

**Tip**: When classifying numbers, remember that rational numbers can always be written as fractions, whereas irrational numbers cannot!

For the exercises 25-28, determine the nature of each number (rational, irrational, integer, etc.)

This page explains how to determine the nature of numbers, such as fractions, decimals, and exponents, covering concepts like rational, irrational, and integer classifications. Suitable for students in grades 7-9.

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