Practical and Mental Arithmetic on a New Plan: In which Mental Arithmetic is Combined with the Use of the Slate : Containing a Complete System for All Practical Purposes : Being in Dollars and Cents D. Burgess and Company, 1839 - 284 σελίδες |
Practical and Mental Arithmetic on a New Plan: In which Mental Arithmetic is Combined with the Use of the Slate : Containing a Complete System for All Practical Purposes : Being in Dollars and CentsD. Burgess and Company, 1839 - 284 σελίδες |