Abacus|Learn to apply Combination Friend Formula for -7=-10+5-2|Finger Abacus|Finger Maths

big friend formula to add +9 =big friend formula to add +9 =big friend formula to add +9 =Abacus-Finger Abacus-Finger Maths- How and When we need to appply Combination Friend Formula for -6
Combination Friend Formula
Abacus level 1
Small Friend Formula
Big Friend Formula
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Finger Abacus Level 1 Topic wise tutorial:
How to represent 0 to 9 on your hand and direct addition and subtraction: https://youtu.be/czjsJG6FuDA
How to represent 10 to 99 on your hand and direct addition and subtraction: https://youtu.be/A5r1J98KoQs
What is big friend formula and how to apply it :
big friend formula to add +9 =https://youtu.be/6sCp9D2ZFN0
big friend formula to add +8=https://youtu.be/8whkE0dZONA
big friend formula to add +7 =https://youtu.be/TxdyxxzUIWM
big friend formula to add +6: https://youtu.be/UoOOFAZZ0Sc
big friend formula to add +5: https://youtu.be/OKOMpmzlw8I
big friend formula to add +4= https://youtu.be/3_47l4alN7g
big friend formula to add +3: https://youtu.be/uD3rgpQ6SF8
big friend formula to add +2: https://youtu.be/N7uMm0x1QPk
big friend formula to add +1: https://youtu.be/HjxAycayr7Y
big friend formula to subtract -9 =https://youtu.be/3y8vEAMNP8A
big friend formula to subtract -8=https://youtu.be/Zs08oPAN0IA
big friend formula to subtract -7 = https://youtu.be/qJqcJIwmIxo
big friend formula to subtract -6: https://youtu.be/IBk-h7U5NmY
big friend formula to subtract -5: https://youtu.be/pjSCr6iAAdo
big friend formula to subtract -4= https://youtu.be/IEAESpU2iNM
big friend formula to subtract -3: https://youtu.be/EYIjjEapikE
big friend formula to subtract -2: https://youtu.be/rfNoVIkSzO4
big friend formula to subtract -1: https://youtu.be/UXwfX58WdpI
Small friend formula to add +4: https://youtu.be/OcgRvHxsaMo
Small friend formula to add +3: https://youtu.be/d8oV8hJ_QxM
Small friend formula to add +2: https://youtu.be/p1dCxJFbEn4
Small friend formula to add +1: https://youtu.be/tadZEut1Gkk
Small friend formula to subtract -1: https://youtu.be/LARsKO9dVWE
Small friend formula to subtract -2: https://youtu.be/0pbMo2w8H9w
Small friend formula to subtract -3: https://youtu.be/0pbMo2w8H9w
Small friend formula to subtract -4: https://youtu.be/jLGV4sSUl-A
Combination friend formula to add +9: https://youtu.be/19nHY3fww2o
Combination friend formula to add +8: https://youtu.be/7_Psgdx67Gc
Combination friend formula to add +7: https://youtu.be/TpZeyjtFm3Y
Combination friend formula to add +6: https://youtu.be/iLqI-5HNnj4
Combination friend formula to Subtraction -9:
Combination friend formula to Subtraction -8: https://youtu.be/SljJofRqmvk
Combination friend formula to Subtraction -7: https://youtu.be/lqPY9i3uWS8
Combination friend formula to Subtraction -6: https://youtu.be/-kwcGNWVmXY

Hi friends, in this video we will learn what the combination formula is in an abacus and how and when we apply the combination formula while we do calculations with a finger abacus.
In this video i will teach how and when we have to apply combination formula for -6.
for more video you can visit
finger abacus zero to hero playlist : https://www.youtube.com/playlist?list=PLZ67c1-XfKx578GRFv4pjW1h6VcCZ1l_n
and finger abacus playlist : https://www.youtube.com/playlist?list=PLZ67c1-XfKx44ts2ogMbst4vsnguaRzRr