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19 results
=================== [ Introducing Semsaem's Abacus and Operations ] Hello, I'm Semsaem, a teacher who teaches abacus in an ...
108 views
5 months ago
주산 #abacus [ 셈쌤의 주산.연산 소개 ] 안녕하세요 셈을 쉽고 재밌게 알려주는 쌤 셈쌤입니다. 오랜기간동안 다양한 기관/연령/학교/ ...
4,367 views
4 years ago
