Soro ban (20).pdf - HƯỚNG DẪN SỬ DỤNG BÀN TÍNH...

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HƯỚNG DẪN SỬ DỤNG BÀN TÍNH SOROBAN CÔNG TY THIẾT BỊ GIÁO DỤC BÀN TÍNH TIẾN MINH – 0904718133 - 0986550236 Ví dụ 2: 15 + 8 = 23 1. Đầu tiên, dùng ngón trỏ của tay phải để thiết lập 5 ở cột C và dùng ngón trỏ của tay trái để thiết lập 10 ở cột B. Lúc này ta có giá trị 15 trên bàn tính. Lưu ý là 2 tay
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  • Winter '18
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