Видео ютуба по тегу Abacus Mental Calculation

Lesson 4 - Introduction to Abacus Mental Math
Lesson 4 - Introduction to Abacus Mental Math
Introduction to Mental Math using the Abacus
Introduction to Mental Math using the Abacus
Abacus Rules - Part - 1.1
Abacus Rules - Part - 1.1
How To Use An Abacus
How To Use An Abacus
Addition and Subtraction using Big Friends on Abacus | InstAbacus
Addition and Subtraction using Big Friends on Abacus | InstAbacus
Abacus Demo at Advance level by Ritwik Sinha ! Watch the effort !!
Abacus Demo at Advance level by Ritwik Sinha ! Watch the effort !!
Japan's ancient secret to better cognitive memory - BBC REEL
Japan's ancient secret to better cognitive memory - BBC REEL
Mental Math/Abacus Ep.4 - Adding and subtracting numbers on the Abacus without rules (中文 sub)
Mental Math/Abacus Ep.4 - Adding and subtracting numbers on the Abacus without rules (中文 sub)
Finger Mathematics - How to calculate Faster than a calculator Mental maths - 10
Finger Mathematics - How to calculate Faster than a calculator Mental maths - 10
Abacus Mental Math - What is Abacus?
Abacus Mental Math - What is Abacus?