THIS IS AN ENGLISH TRANSLATION OF A RUSSIAN TEXTBOOK ON FIRST-GRADE ARITHMETIC COMPLETE WITH GRAPHS, PICTURES, PROBLEMS, AND LESSONS. ADDITION, SUBTRACTION, MULTIPLICATION, AND DIVISION APPEAR IN 892 PROBLEMS. THE THREE SECTIONS ARE ENTITLED "THE FIRST TEN,""THE SECOND TEN," AND "THE FIRST HUNDRED." THIS TRANSLATION WAS DONE IN CONNECTION WITH RESEARCH CONTRACT NO. 403 (7672) WHEREIN THE RUSSIAN APPROACH TO THE TEACHING OF MATHEMATICS IS STUDIED. (GC)