????????? ?????(www.surisem.net)? ???? ???????????? ???? ‘?13? ?? ??? ???? ????’? 8? 29?(?) ?? ??? ??? ???? ?????? ???.
??? △??? △?? 1??? △?? 2??? △?? 3, 4??? △?? 5, 6??? ? ? 5? ???? ?? ???. ???? ?? 1???? ??, ?? 2???? ??? ??, ?? 3~6??? ??? ??, ??, ??? ??? ??? ??? ??? ??? ?? ???? ????.
????? ??? ?? ? ??? ?? ??? ??? ??? ???? ??. ??? ??? ??? 2?, ??? ???? ??? 1??? ????. ??? ??? ???? ??? ???. ??? 1?(1?), 2?(2?), 3?(3?)??? ?? ? ???, ???? ????.
??? ??? ????? ???? ??. ?? ??? 8? 7?(?)?? ??????????? ????(www.abacuskorea.org)?. ?? 1544-5731