http://www.learningbox.com/Base10/BaseTen.html Click on this blue hyperlink to find a MAB game. Click on the small 100 button to make the game more tricky.
Back in ones.http://www.oswego.org/ocsd-web/games/spookyseq/spookycb1.html Click on these blue hyperlinks to revise patterns skip counting.
Back in 10s
Back in 5s
Back in 2s
http://www.ictgames.com/funkymum.html A fun addition game: