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How to multiply any numbers in mind? Almost forgotten way to school

Mathematics is fraught with many surprises. According to Gleb Pobedimskogo who posted this scheme in his blog, once we have all been taught this method of counting in schools. The trick in the ranks numbers! < Website invites the reader to use this method to learn quickly take in mind.







via gleb1368.livejournal.com/3943675.html
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