"Brain Abacus Full Course (Beginner)" covers basic to advanced mixed addition and subtraction, as well as quick arithmetic. The course is mainly divided into two parts, namely the interactive tutorial and the two-handed beading demonstration.
"Brain Abacus Full Course (Beginner)" covers basic to advanced mixed addition and subtraction, as well as quick arithmetic. The course is mainly divided into two parts, namely the interactive tutorial and the two-handed beading demonstration.