Abacus Lesson 1 // Introduction, Proper Technique, & History of the Abacus // Tutorial

How To Use An Abacus-Full Tutorial

Abacus from basics || Abacus Lesson 1 || Introduction.

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How To Use An Abacus? | I Spent 30 Days Using an Abacus and Here's What Happened | Mental Maths

How To Use An Abacus

Abacus Rules for Beginners