All four arithmetic examples and exercises are provided with detailed and smooth versions of video teaching It is suitable to - Children with strong self-learni

All four arithmetic examples and exercises are provided with detailed and smooth versions of video teaching It is suitable to - Children with strong self-learni

A Complete Abacus Mind Math Instruction and Workbook for addition and subtraction, the book includes: Instructions on how to effectively introduce children to m

This is a simple guidebook for people who are interested in learning the introduction of how an Abacus works. The book includes simple explanation of the theory