Publisher's Synopsis
Excerpt from Key to the Progressive Practical Arithmetic: Including Analyses of the Miscellaneous Examples in the Progressive Intellectual Arithmetic; For Teachers Only
In many examples and problems the same results may be obtained by different processes, but the shortest and most simple method is to be desired; hence the object of a Key should be to give not results only, but the explanation of methods, and a full analysis of such questions as contain a peculiar application of principles involved.
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