Chinese Zhusuan is a time-honoured traditional method of performing mathematical calculations with an abacus. Practitioners can perform addition, subtraction, multiplication, division, exponential ...

Chinese Zhusuan is a time-honoured traditional method of performing mathematical calculations with an abacus. By moving beads along rods, practitioners can perform addition, subtraction, ...

Exhibits include the abacus, an ancient Chinese calculator, in different shapes and sizes displayed in its own museum in Nantong. Xu Congjun / for China Daily A necklace of museums rings the city of ...