Inductive Lessons IN INTELLECTUAL ARITHMETIC: DESIGNED TO ILLUSTRATE THE NATURE OF NUMBERS AND OF NUMERICAL OPERATIONS. BY DANA P. COLBURN, PRINCIPAL OF THE RHODE ISLAND STATE NORMAL SCHOOL; AUTHOR OF THE "CHILD'S PHILADELPHIA: H. COWPERTHWAIT & CO. 1860. ARVARD COLLEGE LIBRAR GIFT OF GEORGE ARTHUR PLI JANUARY 25, 12. Entered, according to Act of Congress, in the year 1859, by in the Clerk's Office of the District Court of the United States for the District of Rhode Island. ELECTROTYPED BY MEARS & DUSENBERY. PREFACE. THIS book is designed for use in the various grades of schools above the Primary, in which Intellectual Arithmetic is made a subject of study. The plan of instruction which it develops is believed to be strictly inductive, truly progressive, and thoroughly practical. Beginning with the smaller numbers and easier combinations, it first presents the operations of addition and subtraction, and then those of multiplication and division. It next treats of multiples and divisors, fractions, interest, profit and loss, partnership, and such other subjects pertaining to business life as the limits of the work will allow. In every part of the book, the operations required are carefully illustrated and explained, and copious exercises are given to insure skill and readiness in their practical application. (3) |