The focus of this lesson is to show mental math tricks to students. The worksheet groups the problems according to the tricks taught in the powerpoint. The powerpoint is linked to here and is a great resource to show how and why mental math tricks can work. This is a simple lesson plan targeted at students in upper elementary or middle school.
The powerpoint walks you through the various tricks and tips that we provide to students. Present it to them in a class setting. Powerpoint: http://www.ocmathcircle.org/santa-ana-math-club/Review%20Powerpoint.key.zip
Directions are also provided for games that help mental math speed, such as 24.