+6 Big Friend Abacus | +10−4 Digital Trick

+6 Big Friend Formula in Abacus | +10 − 4 Easy Digital Method

In this video, students will learn how to apply the +6 Big Friend formula in abacus, explained as +10 − 4, using a digital abacus tool.

This method is useful when there are not enough beads to add directly, helping children solve problems smoothly using logical adjustment.

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