Yi xue jiu hui de shan suan

By Liu kai yun, Wang yi

Subjects: Pu ji du wu, Su suan

Description: Ben shu yi ren men chang yong de ji suan wei nei rong, Chan shu ji suan yuan li, Xi tong jie shao le liang ge shu jia jian cheng chu, Cheng fang, Kai fang de duo zhong shan su ji qiao.