Скачать или смотреть Learn Big Friend Subtraction Formula (-1 = -10 +9)😀|When & how to use (-1 = -10 +9)🥰|Leve 1 abacus 👆

Hi everyone, Hope you are doing well. In this video i have shared the detail exaplanation of when & how we can apply big friend addition of -1 = -10 +9 . Also i have used few examples while explaining the concept. Do let me know how are doing ?
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