The purpose of this book is twofold: to supply the teacher with material for class instruction; and to provide a text-book for children to study as soon as they know how to read. The course herein begins with the number ten and proceeds by hundreds and thousands to one million, teaches the elementary facts of fractions and parts of numbers, thoroughly develops the fundamental operations, -- addition, subtraction, multiplication, division, and comparison, -- and begins the subject of denominate numbers, using the fundamental facts in many problems. [Cover title varies: "Primary Arithmetic."]