Complete Arithmetic —— Complete Oral and Written Exercises in a Natural and Logical System of Instruction

----- 完全算术

ISBN: 9781330169728 出版年：2016 页码：333 Albert N Raub Forgotten Books

Teachers everywhere seem to be awaking to the reality that what has been called Mental or Intellectual Arithmetic is best taught, and only properly taught, in connection with Written Arithmetic. The two are inseparable, and together constitute but one subject or branch of study.