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Practice -3 Formula in Abacus | -3 = -10 + 7 | Big Friends Formula Using Digital Abacus Tool

Master the Minus 3 Big Friends Formula in Abacus with this easy and interactive practice session using the Digital Abacus Tool by Abacus Trainer. In this video, students will learn how to solve subtraction problems using the formula:

 -3 = -10 + 7

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