Subtraction Study EX Trial в Android Market

Subtraction Study EX Trial (v. 1.2) Разработано KZMS Software

The child who starts the study of the subtraction answers the question as though it were a game, and the subtraction can be studied in the future. Please play so that the play time displayed under the left may shorten when you can get 100 points. Only easy mode of the trial version is effective.