Mentalna Aritmetika za Brzo i Učinkovito učenje

Largest abacus lesson – Guinness world records

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Largest abacus lesson – Read article

The largest abacus lesson consists of 873 participants, achieved by Brainobrain International, (United Arab Emirates) in Dubai, United Arab Emirates, on 24 November 2018. This is the second successful attempt at this record in 2018.

Largest abacus lesson

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