In mathematics, \(1-2\) is a simple subtraction problem:

\[
1 - 2 = -1
\]

Thus, the result of \(1 - 2\) is \(-1\).

Would you like more details or have any questions?

Here are 5 related questions to expand on this:
1. What is the result of \(2 - 5\)?
2. How do negative numbers work in addition and subtraction?
3. Can you solve \(3 - 7 + 2\)?
4. What is the absolute value of \(-1\)?
5. How can subtraction be visualized on a number line?

**Tip:** Subtracting a larger number from a smaller one results in a negative number.

Understand the simple subtraction problem 1 - 2 and why the result is -1. This example introduces basic arithmetic concepts, including how subtracting a larger number from a smaller one leads to a negative result. Perfect for students in Grades 1-3.

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