Practical Introduction to Abacus Calculation

Author: Chao Jinquan
Publisher:
Publish Date: 2005-10-01
Features: This book comprehensively and systematically introduces the basic knowledge of abacus, as well as the calculation methods for abacus addition, subtraction, multiplication, and division, abacus-style mental arithmetic addition, subtraction, multiplication, and division, percentages, powers and roots, area, volume, and capacity calculations, and methods for identifying abacus calculation errors.