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In this video, you will learn the -4 formula in abacus, also known as the +1 - 5 formula, an important technique used for quick and efficient subtraction. This method is especially useful when direct subtraction is not possible, helping children solve problems in a smarter and easier way.
The minus four formula in abacus is part of the small friends subtraction method, where numbers are broken down into simple steps. This approach helps children understand calculations clearly and apply them with confidence.
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