Addition and Subtraction
These games will help children with their addition and subtraction skills.
Addition
http://www.bbc.co.uk/schools/laac/numbers/ch1.shtml
http://www.amblesideprimary.com/ambleweb/mentalmaths/numberbond.html
http://more2.starfall.com/m/math/addition-content/load.htm?f&d=demo&n=machine-L1&y=1
http://www.ictgames.com/funkymum.html
http://www.amblesideprimary.com/ambleweb/mentalmaths/additiontest.html
http://www.ictgames.com/dinosaurDentist/index.html
http://www.ictgames.com/frog.html
http://www.ictgames.com/spacejumps.html
http://www.ictgames.com/technowithflock.html
http://www.ictgames.com/100huntplus10.html
http://www.crickweb.co.uk/ks2numeracy-properties-and-ordering.html
http://resources.oswego.org/games/SumSense/sumadd.html
Subtraction
http://www.amblesideprimary.com/ambleweb/mentalmaths/subtractiontest.html
http://www.ictgames.com/targettakeaway.html
Bridging through 10
http://www.ictgames.com/catapultCountOn/index.html