When DD was 7, she did the same thing! She has since been grade skipped and in the beginning of the year, we were still constantly doing it but as the year went on, the more the math got into the less basic material, the less the mistakes were happening. while the material is still way too easy, it was better than it was. For example.... adding and subtracting multiple digits, she'd make the dumbest mistakes, but doing long division with remainders or multi-digit multiplication and the errors stopped. She used to blatantly skip over problems, you name it, it has definitely improved now.
