Mental Math/Abacus Ep.4 - Adding and subtracting numbers on the Abacus without rules (中文 sub)
10:27
Mental Math/Abacus Ep.5 - 10's rules : +9,+8,+7,+6 (中文 sub)
5:26
Turn 2 Eggs Into Fluffy Japanese Soufflé Pancakes!
8:24
Mental Math/Abacus Ep.2 - How to read numbers and beads on an abacus (中文 sub)
13:33
Finger Mathematics - How to calculate Faster than a calculator Mental maths - 10
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Learn to use the abacus(soroban), the Japanese way - Part 2
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Does abacus still work? 算盤還有用嗎? #math
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Abacus Tutorial: 1 Basic function
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