Abacus || English || Lesson 7 Ex: (67 - 43), (815 - 72 - 48) & (624 - 96 - 24) || Subtraction Sums

3 examples of Regular Subtraction on Abacus have been explained in this video. The examples covered are:
1) 67 - 43 ;
2) 815 - 72 - 48 ;
3) 624 - 96 - 24

While doing subtractions like these on the Abacus, we need to use the appropriate Small Friend or Big Friend or Combination Formula, depending on the situation at hand. I have explained the way we need to think about which Formula to use in each situation.

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http://ankmitra.blogspot.com/p/abacus-video-tutorials.html

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Видео Abacus || English || Lesson 7 Ex: (67 - 43), (815 - 72 - 48) & (624 - 96 - 24) || Subtraction Sums канала AnkMitra Abacus & Maths by Mandar Sherbet