The expression "1-1" simplifies to:

\[
1 - 1 = 0
\]

Would you like more details or have any questions?

Here are 5 questions to expand this concept:

1. What is the result of \(2 - 1\)?
2. What happens when you subtract a number from itself, like \(x - x\)?
3. Can you explain the difference between subtraction and addition?
4. What is the difference between \(1 - (-1)\) and \(1 - 1\)?
5. How does subtraction work with fractions, like \( \frac{1}{2} - \frac{1}{4} \)?

**Tip:** Subtracting a number from itself always results in zero, no matter how large or small the number is.

Explore the basic concept of subtraction with the simple problem 1 - 1. This problem demonstrates the identity property of subtraction, where subtracting a number from itself always equals zero. Suitable for early learners in Grades 1-3.

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