* Add typing to maths/add.py https://stackoverflow.com/questions/50928592/mypy-type-hint-unionfloat-int-is-there-a-number-type * Update add.py * Update add.py
* Rename math/add.py to maths/add.py * fixup! Format Python code with psf/black push * Fix sum to add * updating DIRECTORY.md Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com> Co-authored-by: John Law <johnlaw.po@gmail.com>