My quantitative skill is above average, and I could do calculations fast (which is a common feedback I get during case interview practices). However, in my daily job, my manager gave me a feedback that my "sensitivity to number" is not good since I had made careless mistakes in typing numbers a few times. I know a way to improve is to always "double check" the figures, but I'd like to know how to improve my sensitivity to number? Some of my friends who are "sensitive to numbers" mentioned that they could remember numbers very naturally and easily, but it seems that I need to spend extra effort to do this. How could I be more "sensible to numbers"?
Appreciate any advice! Thanks.