1. **State the problem:** Calculate the sum of $-12$ and $-7$.
2. **Formula and rules:** When adding two negative numbers, add their absolute values and keep the negative sign.
3. **Intermediate work:**
$$-12 + (-7) = -(12 + 7)$$
4. **Simplify:**
$$-(12 + 7) = -19$$
5. **Final answer:**
The sum of $-12$ and $-7$ is $-19$.
Add Negative Numbers 554Cd6
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