Originally Posted by ultramarina
Heck,I can't really do 35 + 17 in MY head, either. wink (Well, not fast. But I do have math phobia.)

DS is like that too with the awesome intonation. It's interesting to me that he still will skip whole lines sometimes, though. I assume that's nothing to be concerned about. He does notice and then gets confused.

Yeah, I don't expect her to do this for a long time. I just didn't want to mislead anyone to believe that she could add two digit numbers in her head. She can add in the double digits--just not two double digits together with grouping?, carrying?