Excerpt from First Lessons in Numbers: In the Natural Order: First Visible Objects, Second, Concrete Numbers, Third, Abstract NumbersConverse Combinations. - Converse or opposite combinations of the same numbers are embraced in the same section, throughout the work, and in many cases in the same article. Thus, in Section II, the child learns to add with 1, 2, or 3 as one of the parts, and to subtract with the same numbers as one of the terms, in Section VI he learns to multiply with 2 or 3 as one factor, and to divide with each of the same numbers as one of the terms, in Section X he learns how to find one half when the whole is given, and how to find the whole when one half is given, and so on, through the first twelve sections.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.