I didn't find this document to be easier to understand than any other guide I've seen. I'd say the introduction to calculus in Susskind's The Theoretical Minimu

I didn't find this document to be easier to understand than any other guide I've seen. I'd say the introduction to calculus in Susskind's The Theoretical Minimum to be vastly better. Also, don't miss The Essence Of Calculus by 3blue1brown: https://www.youtube.com/playlist?list=PLZHQObOWTQDMsr9K-rj53DwVRMYO3t5Yr https://www.youtube.com/playlist?list=PLZHQObOWTQDMsr9K-rj53...