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Addition and Subtraction using Big Friends on Abacus | InstAbacus
Big Friends Subtraction in Abacus//Abacus lesson -10
Abacus Tutorials | Lesson - Formula In Big Friend | Abacus Classes
Abacus - Big friends addition 1 to 4 techniques - Part - 3.1
Abacus - Big friends subtraction 1 - 5 techniques - Part - 3.3
Addition using Big Friends on Abacus | Addition using abacus | InstAbacus
Subtraction using Big Friends on Abacus | InstAbacus
How to add on Abacus || Abacus big friends concept || Learn Abacus || Abacus Lesson 4
Abacus - small friends addition concept - Part - 2.1
Addition and Subtraction using abacus | InstAbacus
English || Abacus classes || level 1:- (+9=+10-1). Big friend concept ||
how to add 75 and 25 using abacus|two digit addition using abacus|InstAbacus