Let's evaluate the given expression step by step:

$1 + (-2) - (-3)$

Step 1: Solve the first operation

$1 + (-2) = 1 - 2 = -1$

Step 2: Solve the subtraction

$-1 - (-3)$

Since subtracting a negative number is the same as adding its positive counterpart:
$-1 + 3 = 2$

Final Answer:

$\mathbf{2}$

Would you like a more detailed breakdown?

Here are some related questions:

1. How do you simplify expressions with multiple negative signs?
2. What is the difference between subtraction and adding a negative number?
3. How can we represent integer operations on a number line?
4. What happens when we subtract a negative number?
5. How do parentheses affect the order of operations?

Tip: Always simplify expressions step by step, handling negative signs carefully!