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KD 36500

is june 1914

Harvard University
Dopt. of Education Library

Gift of the Publishers

LIBRARY
4888

COPYRIGHT, 1914,
By D. C. HEATH & Co.

ID 4

PREFACE

THEȘE books aim to develop all the mathematical skills needed by the average man in the accurate conduct of his affairs. Care has been exercised to omit problems and computations not useful in ordinary life. Equal caution has been exercised to include any new facts or powers now commonly required. Arithmetic is here treated as a tool intended for effective use in practical life; hence the standard of social utility has everywhere determined the content of these texts.

The distribution of topics throughout the grades has been greatly influenced by the fact that many children leave school before they have mastered the fundamental processes in arithmetic. Essentials ought to be taught as soon as possible. The most important arithmetical facts and skills should come first, and the least significant last. By applying these two principles to the organization of these books, it has been easy to achieve that much desired end, the completion of the fundamentals in

six school years.

This volume, the second in a two-book series, covers the last half of the elementary school. The chief purpose of its early sections is to complete the child's mastery of such processes of calculation as are too complex for the primary grades. Short methods of calculation are intro

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