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 ... Edition, Revised and Enlarged, With Exercises - Tapa blanda

Excerpt from 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; Stereotype Edition, Revised and Enlarged, With Exercises for the Slate to Which Is Added a Practical System of Book-Keeping

As this mode of teaching recognises no authority but that of reason, it was found necessary to illustrate the rule for the extraction at the Cube Boat. By means of blocks, which accompany this work.

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