https://learningapps.org/6477459
https://learningapps.org/3738584
http://inschool.gr/G5/MATH/KLASMATA-ISODYNAMA-PRAC-G5-MATH-MYmillion-1401051823-tzortzisk/index.html
http://www.sheppardsoftware.com/mathgames/fractions/memory_fractions3.htm
https://learningapps.org/7753836
https://learningapps.org/2602644
http://www.sheppardsoftware.com/mathgames/fractions/memory_fractions3.htm
http://www.sheppardsoftware.com/mathgames/fractions/reduce_fractions_shoot.htm
http://inschool.gr/G5/MATH/KLASMATA-OMONYMA-VAL-G5-MATH-HPwrite-1405061731-tzortzisk/index.html
http://www.sheppardsoftware.com/mathgames/fractions/FruitShootFractionsSubtraction.htm
http://www.sheppardsoftware.com/mathgames/fractions/FruitShootFractionsAddition.htm
http://www.sheppardsoftware.com/mathgames/fractions/FractionsToDecimals.htm