COMMON SCHOOL ARITHMETIC BY D. B. HAGAR, PRINCIPAL OF STATE NORMAL SCHOOL, SALEM, MASS. PHILADELPHIA: 1872. Educ T 118.72.448 NARYAD COLLEGE LIFEARY BY EXCHANGE FRON NEW YORK STATE LIBRARY HAGAR'S MATHEMATICAL SERIES. I. PRIMARY LESSONS IN NUMBERS. IV. ELEMENTARY ALGEBRA. (IN PREPARATION.) To be followed by other Books of a Complete Series. Entered, according to Act of Congress, in the year 1871, by DANIEL B. HAGAR and HENRY B. MAGLATHLIN, In the Office of the Librarian of Congress, at Washington. WESTCOTT & THOMSON, SHERMAN & Co., INTRODUCTION. THIS Common School Arithmetic is designed to be a complete manual for learners who may be prepared to advance beyond the first lessons in Numbers. It has been constructed with a view to the most rapid and thorough progress of the pupil by the use of the least number of books possible, and by the greatest economy of time. It combines mental and written exercises in a practical system. All obsolete and valueless material and all merely puzzling problems have been excluded, but no pains have been spared to embody valuable modern methods of computation and topics having direct relation to business as it is transacted at the present day. The work is sufficiently comprehensive to render the use of a higher arithmetic quite unnecessary. It is ample enough in its range of subjects and exercises to qualify the learner for a skillful and prompt solution of all ordinary problems of a commercial character, and at the same time to subserve the purposes of mental discipline. The Primary Lessons in Numbers and the Elementary Arithmetic, of this series, it is believed, form a valuable compendious course sufficient for a majority of pupils. The Primary Lessons and the Common School Arithmetic likewise form a two-book course, but full and complete. 3 10 |