i really enjoyed this book as a kid, it approaches math from a less formal and more fun puzzle-based approach: https://www.amazon.com/Big-Book-Brain-Games-Mathe

i really enjoyed this book as a kid, it approaches math from a less formal and more fun puzzle-based approach: https://www.amazon.com/Big-Book-Brain-Games-Mathematics/dp/0761134662/ref=asc_df_0761134662?mcid=875bb7289b5e3fe89c60ba5c3d5a06a9&hvocijid=13417891470244990766-0761134662-&hvexpln=73&tag=hyprod-20&linkCode=df0&hvadid=721245378154&hvpos=&hvnetw=g&hvrand=13417891470244990766&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=1014177&hvtargid=pla-2281435177418&psc=1 https://www.amazon.com/Big-Book-Brain-Games-Mathematics/dp/0...