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BigFriend(+9,-9)||Class10||Abacus||Level1||Eng
ABACUS LEVEL 1 Big Friend +9 and +8 in English.
English || Abacus classes || level 1:- (+9=+10-1). Big friend concept ||
#abacus Big Friend -9 = -10 + 1
#Abacus Big Friend +9 = -1 + 10
Abacus Tutorials | Lesson - Formula In Big Friend | Abacus Classes
Abacus || part 1- Big B Formula + 9 & +90 ||
#abacus Big Friend +1 = - 9 + 10
Abacus(Level 1) -9Big Friends(sub)Problems
Abacus Big Friend Addition Formula + 9 = - 1 + 10, Lesson-17
BigFriendFormula||Class9||when & how to use big friend,small friend||Abacus||Level1||Eng
Abacus LEVEL 1 Big Friends introduction in English
