From: David Corking
My mental model for arithmetic is a clock face, which is very clumsy in base 10 (and worse in base 16!)
Hi David,
This is very interesting. Something I had not thought of, but it makes perfect sense that a picture of numbers would help. I found something very similar playing Sudoku. It's a lot of fun. When I first started playing I would find missing numbers by counting from 1 to 9 and looking for the missing numbers. It became obvious to me that I didn't need to do that and that I could just look at all the numbers at once and for what ever reason the picture itself allowed me to figure out what was missing. The mind works in very amazing ways!
Ron