Subtraction – TeacherLED

Difference Triangle

Posted on July 23, 2016 by Spencer

This puzzle resource is a very difficult challenge and brings up to date this earlier resource (not tablet compatible) so that the same challenge can be worked with on all devices. It is simple enough to understand. Swap tiles so that each number in the triangle is the absolute difference between the two numbers below. […]

Astromath

Posted on October 7, 2017 by Spencer

This math practice game is for children to employ quick addition and subtraction skills. It is compatible with all devices with a modern browser. The player controls a craft using thrust to go up and left and right controls. Going down is left to gravity. The player is told to take the craft either higher or lower […]