Math Tower Defense - Subtractions

This game has been designed to boost mental math strategies with subtractions. Story : Evil monsters are coming to destroy planet earth. You are the hero to save all of us. Gods gave you the Magical Subtraction sword. Build and upgrade towers as you use your magical subtraction power to earn gold faster. Features: This is a tower defense game build in a narrative story. The player needs to work on his/her mental subtraction strategies to win the game against the evil monsters. -Discover fun levels to practice each strategy. . - Monsters' encyclopedia. - Fun and engaging Story mode. Contents: all mental strategies explained for subtractions : - reciprocity with additions -pass to tens . - compensation -distributive strategy - steps by steps guide ... - progressive learning of mental subtraction strategies through levels. Happy Gaming and Learning.