Wow! – Mathemagics: Mental Math Review

Some of these tricks are things I figured out as a kid but was discouraged from trying because it wasn't the "right way." These techniques honestly make me both faster and far more accurate in my math. "Wrong" way FTW! The app is really well designed. It gives you a chance to do the problem in your head before giving you the multiple choice and at any time you can go review the lesson.
Review by LividInLA on Mathemagics: Mental Math.