FORT LEE — For 10 seconds, a series of 50 random three-digit numbers flashed on the screen. After another second, abacus master Jeonghee Lee announced she'd finished the mental addition, correctly ...
AMMAN — HRH Princess Sumaya bint El Hassan, President of the Royal Scientific Society (RSS), patronised the opening of the 14th UCMAS National Abacus and Mental Arithmetic Competition, held at the ...
Junior UCMACS Abacus Mental Arithmetic Skills, a renowned institution in the field of abacus and mental arithmetic training for over two decades, has set an extraordinary benchmark in the world of ...
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