Do you fix the mistakes in class 2 homework before it goes back, or let the teacher see them?

My partner and I disagree on this one. Our older daughter is in class 2 and the homework is small, a page of sums or five sentences. I check it at night and point out what's wrong. My partner says the teacher should see the mistakes, otherwise she'll assume the kid has it all figured out. Last week I made her redo three sums and she wrote 'papa said' next to each of them. So the teacher knows anyway. What do other parents do at this age?