Few links for 9th Standard as per CBSE syllabus
Linear Equation
http://www.quia.com/rr/42586.html
http://www.proprofs.com/games/crossword/linear-equations-in-one-variable/
Like terms matching
http://www.mathwarehouse.com/games/our-games/like-terms-games/like-terms-quartet/play-like-terms-quartet/
To explore further on the below link
http://www.onlinemathlearning.com/algebra-math-games.html
http://www.sheppardsoftware.com/mathgames/decimals/DecimalModels10.htm
http://www.softschools.com/math/geometry/triangles/congruent_triangles/
Multiplication Games
http://www.multiplication.com/games/play/road-rally-multi-player-multiplication
Linear Equation
http://www.quia.com/rr/42586.html
http://www.proprofs.com/games/crossword/linear-equations-in-one-variable/
Like terms matching
http://www.mathwarehouse.com/games/our-games/like-terms-games/like-terms-quartet/play-like-terms-quartet/
To explore further on the below link
http://www.onlinemathlearning.com/algebra-math-games.html
http://www.sheppardsoftware.com/mathgames/decimals/DecimalModels10.htm
http://www.softschools.com/math/geometry/triangles/congruent_triangles/
Multiplication Games
http://www.multiplication.com/games/play/road-rally-multi-player-multiplication