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Excerpt from The Texas Mathematics Teachers' Bulletin, Vol. 9 It may be asked why worry about mental arithmetic in the day of labor saving machinery such as computing ma chines, tables and slide rules. Why stimulate the develop ment or rebirth of mental arithmetic by incorporating in the contests of the Interscholastic League a mental arith metic test similar to the spelling and music memory con tests. The first would be much less a test of memory than the latter two. Mr. Russell of the Central High School of Fort Worth is the author of this suggestion. There are many benefits to be urged for a thorough grounding in numbers. It has become very fashionable of late to speak in large numbers (a modest sum of money expressed in Polish or German marks), but very few stu dents have any adequate notions of magnitude. The rela tive magnitudes in centimeters of the diameters of an electron and the universe, the wave length of sodium and that of a very long wireless wave represent adventures into the realms of the very small and the very large. How big is 2 raised to the thirty second power? How big is 2 raised to the minus tenth power? Not only is the judgment as to the ratio of large and small lacking in students but it is necessary to point out as early as possible that. Large and small are relative terms and involve implicitly a ratio. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This 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.

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