Do you mean addition/ subtraction facts or multiplication facts?
There are loads of games you can get that work on these facts. (Like board games etc). I made a set of fun card games for Aiden when he was younger for bonds of 10/20/multiplication that works like snap.
Many years ago there was a game called "24" (card game that used all four operands mentally). I can't find it here but maybe you can get it there?
One easy way is to just slow it down. Take it outside and lie on the grass, make a rule that you have to take at least 30 seconds (or whatever) before you answer - do this while building lego or a puzzle at the same time.
One our favourite online games is Timez Attack. (
www.bigbrains.com) they have addition, subtraction, multiplication and division on there. There is a paid version but the free one still goes all the way through and is awesome fun!
I know on
www.mathletics.com (which is an online maths sylabus - paid), they have a "live" rounds section - where the kids go against other kids around the world in 60 second rounds to see how many basic fact questions they can get right. I prefer dreambox.com over mathletics, but we all loved the live sessions so much!
even with expensive international shipping I had to get this game!!