Here are some helpful website that help with your math skills!
http://www.aplusmath.com/Games/index.html
http://classroom.jc-schools.net/basic/math-integ.html
http://www.softschools.com/math/games/
http://www.aaamath.com/
http://amby.com/educate/math/integ_x1.html
http://www.gamequarium.com/integers.html
http://www.mathwizz.com/integers/index.htm
http://arcademicskillbuilders.com/
http://amby.com/educate/math/integer.html
http://www.shodor.org/interactivate/activities/ArithmeticFour/
http://mathsnet.net/algebra/l1_equation.html