📁 Fermat,
Pierre de Fermat, 1601-1665. French lawyer and government official most remembered for his work in the foundations of the calculus and in number theory, in particular for Fermat's Last Theorem.
条目 (3+)
Math Forum Discussion: geometry-pre-college
http://mathforum.org/epigone/geometry-pre-college/
The Concept and Teaching of Mathematical Place Value
http://www.garlikov.com/PlaceValue.html