Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
그는 주산을 잘해서 수학 시험에서 높은 점수를 받았다.geuneun jusan-eul jalhaeseo suhak siheom-eseo nop-eun jeomsu-reul badasda.He is good at mental calculation, so he scored high on the math exam.