ISBN: 9787811227949 - 计算技术与点钞 (1 risultati)

paperback. Condizione: New. Language:Chinese.Pages Number: 164 Publisher: Northeastern University Press. Financial Pub. Date :2009-09. This book includes: basic knowledge of the abacus. abacus addition and subtraction. multiplication. abacus. Abacus division. summons algorithm accounts table algorithm. a simple mental arithmetic. Counting technology. Contents: Chapter 1 Basics Abacus 1.2 Abacus 1.1 Abacus overview of the structure and the allocation of bead method of writing numbers 1.4 1.3 Chapter 2 of abacus training .…