how to add 75 and 25 using abacus|two digit addition using abacus|InstAbacus

Learn the big friends formula for addition and Subtraction using abacus.
It is explained in detail in this video. Watch it till the end for proper understanding.

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Big Friends on Abacus

Addition using Big Friends

Subtraction using Big Friends on Abacus

Small Friends on Abacus

Addition using Small Friends

Subtraction using Small Friends

Abacus Masterclass - Level I

Abacus Masterclass - Beginner Level

I have designed a easy to understand table for you. Make one for yourself and put it on your wall. Or just check out here.
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Addition using Big Friends on Abacus free printable Abacus practice worksheet

Subtraction using Big Friends on Abacus free printable Abacus practice worksheet

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