Abacus Oral Practice Sums || Set-1 of Subtraction Sums || 2-digit / 5-rows || Stage - 2 & 3 https://www.youtube.com/watch?v=H1RC5elVub8

Abacus Oral Practice Sums || Set-2 || Addition Sums || 2-digit / 5-rows || Stage - 2 & 3 https://www.youtube.com/watch?v=pqf8B9_M3JE

Abacus Oral Practice Sums || Set-1 || Addition || 2-digit / 5-rows || Stage - 2 & 3 https://www.youtube.com/watch?v=gERo9VrzPww

Online Abacus Course (OAC) || Announcement & Details || (in Hindi) || https://www.youtube.com/watch?v=09Kzok1KwO0

Online Abacus Tests Series || Abacus Competition || Details explained || (in Hindi) https://www.youtube.com/watch?v=eQmxrXRNQVc