1. (7 points) In the equality $1-2-4-8-16=19$, place several modulus signs so that it becomes correct.
Answer. || $1-2|-| 4-8|-16|=19$.

There are other examples.

Comment. It is sufficient to provide one example. It is not necessary to explain how it was obtained.

## Evaluation criteria.

## - Any correct example -7 points.