1. **State the problem:** Find the opposite of each given number. 2. **Formula and rule:** The opposite of a number $x$ is $-x$. This means you change the sign of the number. 3. **Calculate each opposite:** - a. Opposite of $-5$ is $-(-5) = 5$ - b. Opposite of $28$ is $-(28) = -28$ - c. Opposite of $-10.4$ is $-(-10.4) = 10.4$ - d. Opposite of $0.875$ is $-(0.875) = -0.875$ - e. Opposite of $0$ is $-(0) = 0$ - f. Opposite of $-8003$ is $-(-8003) = 8003$ **Final answers:** - a. 5 - b. -28 - c. 10.4 - d. -0.875 - e. 0 - f. 8003