Summa de Arithmetica

"Summa de Arithmetica," written by mathematician Simon Stevin in 1608, is a comprehensive book that explores practical and theoretical aspects of arithmetic. It covers basic calculations, decimals, fractions, and more advanced mathematical concepts, providing methods for everyday commerce and scientific work. The book aimed to make arithmetic accessible and useful for a wide audience, emphasizing clarity and systematic presentation. Stevin's work helped popularize decimal notation, improving accuracy and ease of calculation, and laid important groundwork for modern mathematics and scientific computation.