Find the additive inverse of the following numbers: 11, 10, |-8|, |-1|.

The additive inverse of a number is the number that, when added to the original number, results in zero. For any number $a$, its additive inverse is $-a$.

• For $|-8|$: The absolute value of $-8$ is 8.
• For $|-1|$: The absolute value of $-1$ is 1.

The numbers are now $11, 10, 8, 1$.

• For 11: The additive inverse is $-11$.
• For 10: The additive inverse is $-10$.
• For 8: The additive inverse is $-8$.
• For 1: The additive inverse is $-1$.

The additive inverses are:
For 11: $\boxed{\text{-11}}$
For 10: $\boxed{\text{-10}}$
For $|-8|$ (which is 8): $\boxed{\text{-8}}$
For $|-1|$ (which is 1): $\boxed{\text{-1}}$