Idiom four operations is a combination of four mathematical operations idiom learning educational game through fun way to learn about numbers and idioms, as well as four practice simple mathematical operations.
* Currently included 464 digital idioms, there are more than 1800 kinds of arithmetic questions, a combination of more than 13 million kinds of changes the subject. * Digital idiom review: at any time and review. * Four arithmetic exercise: Exercise mathematics four stress-free operation. * Idiom four operations: arithmetic combination idiom game mode, make learning more fun.