And for some kids those problems will take forever to figure out and there might even be tears, other kids they will be just the right challenge. What I did with my child was put him in a dual language immersion program where half his day is in Spanish and half in English. The Spanish half of his day was challenging enough that the mind-numbingly boring/easy part was okay for him in first grade.
And now in second grade he has two teachers that really get differentiation for reading, writing and science. Early in the year, they just grabbed a third grade math text book plus use available computer programs for him for accelerating math. I also know that he does some but not all of the regular assignments as well (they like documentation that he has those skills already). And Spanish continues to be the really hard, effort required part of his day.