九章算术 jiǔzhāngsuànshù The Nine Chapters on the Mathematical Art Origin Definitions Defs Strokes Stroke Words Sentences Sents 九章 jiǔzhāng The Nine Chapters on the Mathematical Art (abbreviation) the 九章算术 jiǔzhāngsuànshù, China's oldest known mathematical text算术 算術 suànshù noun arithmetic the branch of mathematics dealing with numbers and basic calculations; a method of counting or calculating