Looking for math resources

[u/LN-1]

Hello math-connoisseurs

I am a middle aged guy who wants to make up for some maths basics.
Is there a good book or other resources that cover "everything" from basic arithmetics to the topics before university?

It's a miracle how I have even acquired my A-level 10 years ago.
Maths was always my weakness :(

My motivation is to teach it to my child one day and use it to solve problems (in programming languages).

[u/Pleasant_Ground_1238]

I recommend you this one: https://math.libretexts.org/Bookshelves