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Mixed Complements +7 in Abacus | +7 = +10 + 2 - 5 | Big & Small Friends

In this video, students will learn the Mixed Complements Formula of +7, expressed as:
+7 = +10 + 2 - 5

This method combines Big Friends (+10) and Small Friends (-5) concepts in abacus to simplify addition when direct beads are not available.

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