In several programs, I've taken to writing safety comments on my uses of arithmetic operators.
Arithmetic is pretty much the most dangerous thing you can do in safe Rust (EDIT: not counting I/O or other similar interactions with the environment outside the program) – you need a lot of reasoning about the program to know that it isn't going to give you a panic or the wrong result.
(Note that wrapping is actually often a worse outcome than panicking, because the program will continue running but using the wrong numbers.)