I remember DS doing that (he is 7) and he seemed to understand it, and I'm glad because I was scratching my head. It didn't make sense to me until I looked carefully at the visuals and watched how things were moving around. Try that and then maybe you can show him what's going on with the pictures. I don't remember the exact type of question that you posted. I think he was doing subtraction. There have been a few Dreambox levels that I thought were really dumb, or not helping, so I whizzed through and did them myself. So that might be an option if it's really not making sense. Just wait til you get to long division and there's a mine cart racing around taking things away. That threw me for a loop as well until I looked at it closely.
