At their Office in Marlborough Street, SOLD BY R. GROOMBRIDGE, LONDON, AND 1842. PREFACE. In this First Book, the practical, and not the theoretical part of Arithmetic is treated of, but it is not intended that Theory should be separated from Practice. The teacher may, by means of a black board and a piece of chalk, make the pupils more readily understand the rules, than could be done by any written explanation, especially at this stage of their progress. For the theoretical part of Arithmetic, teachers and monitors are referred to the Second Book of Arithmetic published by the Commissioners. |