F1 · Numbers That Learn
Adding and Stretching
Add two vectors and scale one, and say what each does to the picture.
Walk 3 right and 1 up. Then walk 1 right and 2.5 up. You could have gone straight there in one move: 4 right and 3.5 up. That is all addition is. The numbers add slot by slot: first with first, second with second.