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+4 = +10 − 6 Abacus Trick | Fast Calculation Method

In this video, we solve abacus questions using the +4 = +10 − 6 Big Friends formula, an important concept in abacus learning and mental math.

The Big Friends formula helps when direct addition is not possible on the abacus. By practicing these abacus questions, students can improve their calculation speed, accuracy, and confidence.

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