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Children abacus simple teaching method (Vol. 2)(Chinese Edition)
ISBN 10: 7565032956
ISBN 13: 9787565032950
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Da: liu xing, Nanjing, JS, Cina
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paperback. Condizione: New. Paperback. Pub Date: 2017-02-01 Pages: 165 Language: Chinese Publisher: press with abacus. hefei university of technology is short for the abacus mental calculation type. also called brain fast. it is the number a calculate bead symbol emerged in the human mind. and according to the principle of the abacus arithmetic for addition. subtraction. multiplication. and division of a way of calculation. it not only has fast computing function. Codice articolo NI057330
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