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Soroban EN
Superclever/SUPERZNALAC 575
#superclever #superznalac #mentalarithmetic #franchise #abacuslearning #math #mostar
World champion in mental calculation 🏆
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Bill Gates Vs Human Calculator
Impossible Challenge: Teenagers mentally calculate 100 3-digit numbers in seconds
HOW CHINESE STUDENTS SO FAST IN SOLVING MATH OVER AMERICAN STUDENTS