Adding Decimals Games 

https://www.splashmath.com/math-skills/fifth-grade/decimal-arithmetic/add-decimals

http://www.math-play.com/soccer-math-adding-decimals-game/adding-decimals-soccer-game_html5.html

https://www.mathplayground.com/ASB_Hungry_Puppies_Decimals.html

http://www.math-play.com/baseball-math-adding-decimals/adding-decimals-baseball-math_html5.html