الآراء
شرح طريقة الحساب بالعداد الصيني (abacus/soroban/le boulier) و التطبيقات التي تساعد في تعلمه بالمنزل
Petite enfance soroban calcul mental Ali ouchari matiere grise(3)
Abacus Demo at Advance level by Ritwik Sinha ! Watch the effort !!
Abacus Tutorial: 1 Basic function
The Japanese Soroban Abacus, Part 1: The Basics
How to multiply in Abacus | How to multiply on Abacus | 2 Digit Multiplication.
Abacus from basics || Abacus Lesson 1 || Introduction.
How to add in Abacus || Abacus Addition || Abacus Lesson 2