Description: This film shows the basic functions of the classic Chinese abacus (5+2). Train your skills with the Mental Abacus app for Android (link below) or visit www.abakusen.se for more information.
[ Ссылка ]
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Description: This film shows the basic functions of the classic Chinese abacus (5+2). Train your skills with the Mental Abacus app for Android (link below) or visit www.abakusen.se for more information.
[ Ссылка ]