3d model of the formula (a+b) in a cube. Print out a 3D model and explain the formula to your child using the example of a cube. Saving the school time.After such a visual explanation, the math will be easier.The figures show the individual terms of the formula.You can also download other 3D models of geometric shapes (https://www.cgtrader.com/3d-print-models/science?author=viteker85q)!if you need other 3D model formats, please contact me!