My 11 year old son would have a really hard time with that many problems, especially with showing his work since he has dysgraphia. If he were not allowed to do his guessing and checking mentally on long division problems so that he could write only as much as necessary to get the correct answer it would take him way too long to do it and he would absolutely hate math. I know from his public schooled friends that if they had 30 problems at the end of a lesson, they were required to do all 30 problems and it didn't matter to the teachers how long it took the kids to do it. It also didn't matter if they had extra-curricular activities like musical theater rehearsals that lasted until 10:00 p.m. They still had to do all of the math homework.
