Make an conjecture to this: 81-18=63, 72-27=45, 21-12=9, 63-36=27

To form a conjecture based on the given examples, let's analyze the patterns in the transformations from the first number to the second number:

1. **81 - 18 = 63**
2. **72 - 27 = 45**
3. **21 - 12 = 9**
4. **63 - 36 = 27**

Observations:

- For each pair of numbers, the first number is formed by reversing the digits of the second number. 
- The result of the subtraction is the difference between the two numbers.

**Conjecture:**  
For any two-digit number \( AB \) (where \( A \) and \( B \) are its digits), if we subtract the number formed by reversing its digits \( BA \) from \( AB \), the result will be the difference between these two numbers. In mathematical terms, for a number \( AB \), the calculation would be \( 10A + B - (10B + A) = 9(A - B) \).

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**Related Questions:**

1. What happens if the first and second numbers are the same?
2. Can this conjecture be applied to three

Explore number patterns in subtraction examples like 81 - 18 = 63, 72 - 27 = 45, 21 - 12 = 9, and 63 - 36 = 27. Understand how these patterns are formed and develop conjectures based on reversing digits and calculating differences.

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