Y2 maths homework not sure if ds being cheeky or clever

[HeavyBoots]

Ds had homework of "write as many add sums as you can with the answer 25, e.g 24+1, 23+2"

Ds wrote:

1. Choose any number.
2. Do 25 - that number.
3. Add the number again.

The answer is always 25.

The next part of the homework was to do the same for 36 and 45.

He wrote: if you want to do different sums it will work too.

He hasn't actually written out any sums but in his view he's done the homework. Should I get him to write some sums out or do you think the teacher will be ok with the fact he's come up with a generalized solution?

If its a new teacher, I suspect she/he may think that you hae "helped". Otherwise I'd say hand it in! Clearly, for most six yr olds,
25+0
24+1
Etc, would be good logical working, so it isn't bad homework, just sounds like she hasn't assessed his level yet.