1. **State the problem:** Simplify the expression $-2-(+3)$. 2. **Understand the operation:** The expression involves subtraction of a positive number, which can be rewritten as adding a negative number. 3. **Rewrite the expression:** $$-2 - (+3) = -2 + (-3)$$ 4. **Add the numbers:** Adding two negative numbers means adding their absolute values and keeping the negative sign. $$-2 + (-3) = -(2 + 3) = -5$$ 5. **Final answer:** $$-2-(+3) = -5$$