Anyway, I see myself in all the kiddos at my school struggling with long multiplication because they still struggle with the basics. There are quite a few downloadable flash cards out there, and even flash cards for purchase but they are pretty big, and take a lot of space an paper. I made it my mission to get 16 cards on a page. Back to back that was 32 problems from one piece of card stock.
I got a surprising response of requests for the document on Facebook so I'm going to try to share it here as a continually accessible resource.
Make sure you print them at full size. Yes, you know the margins are set outside the printable area. Yes. You want to leave them that way.
I like hole punching them and using a binder ring aka book ring to hold them together (this way you can easily shuffle.) Curly wrapping ribbon works well too, it's slick and flexible enough.