Dubbs' Complete Mental Arithmetic: A Volume of Carefully Graded Exercises Adapted to the Use of All Schools (Classic Reprint)

Excerpt from Dubbs' Complete Mental Arithmetic: A Volume of Carefully Graded Exercises Adapted to the Use of All Schools

By this use of equations (or arithmetical sentences) several solutions by as many different pupils may be accomplished in the same time formerly consumed by one pupil in the wordy analysis; and it is claimed for this procedure that the plainest and briefest expression for mental operations saves valuable time, and is most likely to be nearest to the actual logic of the mind itself. By the Old-time analysis the words spoken or printed in the solution of many problems would occupy half a page of the book, or consume several minutes in utterance.

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