Hellow guys, Welcome to my website, and you are watching 026.기초주산/덧셈, 뺄셈/보수,짝,6~9운주법/총정리. and this vIdeo is uploaded by 셈쌤의 주산과 교과연산 at 2022-02-25T06:49:50-08:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.
