What are the best books/resources for Rapid Math /Arithmetic Hacks?
November 12, 2020 6:36 PM Subscribe
I've always been interested in quick mental math/arithmetic. e.g. Sometimes I find myself checking a bill by adding it up the way we were taught in school. I'm sure there are better ways. What are the best books/resources? Looking for math techniques that can be used often, are easy to remember and easy to use!