I wish I knew how to figure out how she sees things like that. She doesn't communicate well in math. She never knows what's wanting if she's told to "show her work," and she can't explain how she got solutions most of the time. I don't think she adds up to get the difference, though - she can't add up to make change, I've seen that.

I'll work on decoding her and see where we get. She cheats badly at war, just recognising the overall pattern of bigger and smaller numbers and trying to get away without saying the sums or differences.