Question: User: What's $1-4$?
1. **State the problem:** We need to find the result of the subtraction $1-4$.
2. **Recall the subtraction rule:** When subtracting a larger number from a smaller number, the result is negative.
3. **Perform the subtraction:**
$$1-4 = 1 + (-4)$$
4. **Calculate:**
$$1 + (-4) = -3$$
5. **Conclusion:** The answer to $1-4$ is $-3$.