Originally Posted by HowlerKarma
So evidently this is a method which is most useful for dividing, say...

10...

by, um-- five?

grin

Yes, this is the problem with lattice division. It works well (?) for "neat clean, easy numbers" but get into larger numbers and 2 or three digit divisors and it becomes overwhelming. I actually had one of my high students show me how to do it last year and it does make sense, but it is not intuitive or useful past elementary school. I don't know how to explain it now though - sorry.