To access many of these games you may have to left click and select "open in new tab"
Fraction Games
http://www.mathplayground.com/Triplets/Triplets.html
http://www.mathplayground.com/hm_fractions.html
http://www.helpingwithmath.com/resources/games/fraction_game3/matching.html
http://pbskids.org/cyberchase/math-games/melvins-make-match/
http://www.sheppardsoftware.com/mathgames/fractions/memory_equivalent1.htm
Adding & Subtracting Decimals
http://www.math-play.com/Decimals-Jeopardy/decimals-jeopardy.html
http://www.math-drills.com/decimal.shtml
http://www.math-play.com/soccer-math-adding-decimals-game/adding-decimals-game.html
http://www.math-play.com/football-math-decimals-place-value/football-math-decimals-place-value.html
http://www.math-play.com/baseball-math-adding-decimals/adding-decimals.html
http://www.math-play.com/adding-decimals-game.html