LIBROS DEL AUTOR: isaiah steen

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  • A Treatise On Mental Arithmetic
    Isaiah Steen
    ''A Treatise On Mental Arithmetic: In Theory And Practice'' is a book written by Isaiah Steen, originally published in 1848. The book is a comprehensive guide to mental arithmetic, covering both theoretical concepts and practical techniques. It is designed to help readers improve their mental calculation skills and become more efficient in solving mathematical problems without ...
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    29,05 €