Indian Abacus Mental Arithmetic is “Arithmetic–working-on-Abacus”.
Indian Abacus Mental Arithmetic is “Arithmetic–working-on-Abacus”. The child works for two levels (Six months) on physical Indian Abacus...
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Indian Abacus Mental Arithmetic is “Arithmetic–working-on-Abacus”. The child works for two levels (Six months) on physical Indian Abacus...