Primary Addition and Subtraction Abacus Mental Arithmetic Training Tutorial (Upper and Lower)

Author: Li Hongzhi Da
Publisher:
Publish Date: 2004-09-01
Features: This book vividly explains the theoretical knowledge and training process of abacus mental arithmetic using bead-shaped language. Preschool children can learn this skill by following the diagrams to manipulate the beads and drawing, all while playing and learning in a fun way.