Practical and Mental Arithmetic on a New Plan: In which Mental Arithmetic is Combined with the Use of Slate : Containing a Complete System for All Practical Purposes Being in Dollars and Cents J.B. Lippincott & Company, 1875 - 128 páginas |
Practical and Mental Arithmetic on a New Plan: In which Mental Arithmetic is Combined with the Use of Slate : Containing a Complete System for All Practical Purposes Being in Dollars and CentsJ.B. Lippincott & Company, 1875 - 128 páginas |