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Numeration is the study and practice of how numbers are named, written, and structured. Books in this category cover topics such as counting, place value, reading and writing numbers in words and symbols, comparing and ordering numbers, and working with different numeral systems and bases (e.g., Hindu–Arabic/decimal, Roman, binary, hexadecimal). It includes historical and cross-cultural explorations of numerals, practical guides for converting between systems, and resources that build number sense for learners of all ages. While it may touch on arithmetic, the focus is on number representation and notation rather than on computational procedures.

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