《颜氏家训·杂艺篇》
算术也是六艺中重要的一个方面，自古以来的读书人谈论天文，推定历法，都要精通算术。
算术亦是六艺要事。自古儒士论天道。定律历者，智学通之。
Arithmetic is one important aspect of the Six Arts. Since ancient times, all scholars have to master arithmetic to understand astronomy and to infer the calendar.