$ sudo apt-get remove libtommath0 

Uninstall libtommath0 including dependent package

If you would like to remove libtommath0 and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove libtommath0 

Use Purging libtommath0

If you use with purge options to libtommath0 package all the configuration and dependent packages will be removed.

$ sudo apt-get purge libtommath0 

If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.

$ sudo apt-get purge --auto-remove libtommath0 

See Also,