Graspable Math is a dynamic algebra notation system. What that means is the math symbols on the screen are interactive! They can be dragged around and clicked to rearrange and simplify an expression. Addends can be commuted by dragging the terms in between one another. If you have two numbers, you can add them by clicking the plus sign between them, or by clicking the right number in the pair. Another option to add terms is to drag one onto another and holding it there.