Let's solve the problem step-by-step:
1. Identify the starting floor:
- The express elevator starts on the 5th floor.
2. Determine the number of floors the elevator descends:
- The elevator descends 8 floors. A descent indicates movement downwards, which corresponds to a subtraction operation or the movement in a negative direction.
3. Set up the equation to calculate the stopping floor:
- We start at the 5th floor and then move down 8 floors.
- This can be represented mathematically as: [tex]\( 5 + (-8) \)[/tex].
4. Perform the calculation:
- Adding a negative number is equivalent to subtraction.
- So, [tex]\( 5 + (-8) \)[/tex] simplifies to [tex]\( 5 - 8 \)[/tex].
- [tex]\( 5 - 8 \)[/tex] equals [tex]\( -3 \)[/tex].
Therefore, the correct equation and computation is [tex]\( 5 + (-8) = -3 \)[/tex].
Among the given options, the correct one is:
[tex]\[5 + (-8) = -3\][/tex]
