I'm not a huge fan of homework before Y5 or 6, but I'm also not a fan of it being set, the DC at best needing continuous help with it, at worst causing friction and unpleasantness at home- then eventually seeing it back, weeks later, with a tick by it. OR sometimes, unsullied by a teacher's pen.
Don't set it if you don't intend at least demonstrating that you've looked at it!
As for reading a book or so a night- no problem, we'd try and do that anyway- but again, don't, on parents evening, politely tell me off for not filling in the reading diary every day when you haven't opened it to see what I've written for weeks- or at least, you haven't acknowledged my input or countersigned it yourself!
I'd like to see maybe 4 or 5 sums they'd been working on to help them consolidate that knowledge; maybe 10 spellings and a chapter of a book- not necessarily all on the same evening and definitely not every night but our homework is tending to be boundary-less and amorphous- eg Do a 3 week homework project on a painter/artist. Present it how you like. Hand it in on... yes, I could go nuts with such a project but a (young) 9 yr old DS needs structure, guidelines, pointers, maybe examples. Otherwise it's just me more or less dictating whilst he idly and aimlessly searches the Web. At 9 they still do not have the skills to fly solo with this sort of unstructured work.
I know why this has been set: So you have nice arty posters and stuff to decorate your classroom for the new intake in Sept!