Put a New Spin On Addition and Subtraction Students can practice two mathematical functions with this fun cube. There are two dice inside the 7" transparent cube, with addition and subtraction functions printed on the surface of the cube. Depending on which sign the dice land on, students can complete the equation created by the upward-facing function and the two dice. With Teach N' Tumble math can fun! Approrpiate for Grades 1-3