They ought to be. I am just feeling the bile rise thinking about this. I have a ds13, who was pretty much in the same boat with minute math, why why WHY do teachers/schools persist with these?
I know some kids do great with these, but that doesn't mean they necessarily are going to tear up the rest of the math curriculum, and so many kids who do well with math concepts seem to get beat about the head an shoulders with this minute / timed math testing to the point of hating math, that it seems extremely clear it is bad news.
I recommend you at least inquire with the teacher/school to see if your child can opt out of these. It worked for us.