Yes these one I made myself using Mathsbot. Doesn't take too long to put together with the old copy and paste tool.

I also expect Dr Frost probably have some as they tend to show all the methods on their ppts.

This is a bit of my department then a bit of me expanding on it. (Since it's not all mine not mine to put as a downloadable)
I use Mathsbot to quicky make them, quick arrow key use and copy and paste.

They were showing an expression with something like 3x and 2y so some of them combined them to get something like 5xy

I've seen Nathan's stuff, lovely stuff but no worded ones for rounding that I can see.
The decimal, fraction and substitution bit would definitely work for the group but I do want to see if I can get more of a mixture (with words) if possible.

Once I've finished it I'll be sure to share. There are definitely tweaks I think I need to do.

What year 8! We do it first time end of year 9. Thought that was early enough!