Posts Tagged ‘abacus’
Mental abacus math: No words required
STANFORD (US) — A 400-year-old style of abacus known as a soroban is the genesis for a method of learning math mentally without the use of language. Continue…
STANFORD (US) — A 400-year-old style of abacus known as a soroban is the genesis for a method of learning math mentally without the use of language. Continue…
