Publisher's Synopsis
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
The blocks, illustrative of the rule for the Cube Root, will satisfactorily account for many results in other rules as, for instance, in Decimals, Mensuration ac. Which the pupil, by any other means might fall to per ceive. By ohservmg these, he will see the reason w y his product, in decimals, should be less than either factor as, for instance, why the solid contents of a half an inch cube should be less than half as much as an inch cube. In this case, the factors are each half an inch, but the solid contents are much less than half a solid inch.
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