Learn −8 Formula in Abacus | −10 + 5 − 3 Big Friends Method

Practice the −8 Big Friends formula in abacus using the easy subtraction trick:

👉 −8 = −10 + 5 − 3

This video by Abacus Trainer helps children understand subtraction formulas through step-by-step digital abacus practice. The Big Friends method makes calculations simple, fast, and easy to remember.

✨ What students will learn:
✔ Digital abacus subtraction techniques
✔ Fast mental math methods
✔ Better number understanding
✔ Improved calculation accuracy

This lesson is ideal for kids learning abacus and students practicing subtraction formulas regularly.

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Видео Learn −8 Formula in Abacus | −10 + 5 − 3 Big Friends Method канала Abacus Trainer