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#abacus Big Friend +8 = -2 + 10
Abacus Tutorials | Lesson - Formula In Big Friend | Abacus Classes
#abacus Big Friend -8 = -10 + 2
Abacus Level 1 Big Friend Addition formula Worksheet +8 = - 2 + 10
ABACUS | Second Level | How to use Big friend | Less formula (-7=+3-10)
ABACUS | Second Level | How to use Big friend | Less formula (-8=+2-10)
#abacus Big Friend +2 = - 8 + 10
Big Friends Subtraction in Abacus//Abacus lesson -10
ABACUS | Second Level | How to use Big friend | Less formula (-9=+1-10)
Abacus Tutorials | Lesson - Formula In Abacus Combination | Abacus Classes
#Abacus Big Friend +9 = -1 + 10
Big Friend Less Formula (-2=+8-10) | ABACUS | Second Level
