This app allows you to easily learn and practice mental math, from the basics (2 digit 2 digit multiplication addition) up to 3 digit squares!-up to 3 digit 3 digit addition and 3 digit 3 digit subtraction.-up to 3 digit / 1 digit division.-up to 2 digit * 2 digit multiplication.-up to 3 digit squares.And these are all interactive!If you want more math, go get Mental Mathematics Paid (just released) for everything up to 5 digit numbers squared (Addition, subtraction, and division are not released yet.).App and design by Nathan McKinley-Pace.If you are having bug problems, PLEASE email me - knowing what the problem is is the only way it'll get better.