ELEMENTS OF ARITHMETIC, PART FIRST. THE PRIMARY SCHOOL ARITHMETIC. DESIGNED FOR BEGINNERS. CONTAINING COPIOUS MENTAL EXERCISES, TOGETHER WITH A LARGE NUMBER OF EXAMPLES FOR THE SLATE. BY HORACE MANN, LL.D., THE FIRST SECRETARY OF THE MASSACHUSETTS BOARD OF EDUCATION, AND PLINY E. CHASE, A.M., AUTHOR OF THE "COMMON-SCHOOL ARITHMETIC." PHILADELPHIA: PUBLISHED BY E. H. BUTLER & CO. |