Subtraction
AVAILABLE NOW IN THE MAC APP STORE
FEATURES: Use a number line to learn about subtracting numbers. Several skill levels to choose from. Each game lasts 60 seconds. High score is recorded for each individual player at each level, never compared to other players. Each player works to beat her own previous high score at each level.
CONTROLS: Beginning mathematicians who are able to use a mouse can play this game. Keyboard is used for entering user name (but not required). Click correct answer buttons to score points and beat your previous high score.
