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BRADBURY'S

EATON'S

. PRACTICAL

A RITHMETIC,

COMBINING

ORAL AND WRITTEN EXERCISES.

BY

WILLIAM F. BRADBURY, A, M.,
HRAD MASTER OF THE CAMBRIDGE HIGH SCHOOL; AUTHOR OF TREATISES

ON ELEMENTARY ALGEBRA, ELEMENTARY GEOMETRY, ETC.

BOSTON:
THOMPSON, BROWN, AND CO.,

23 HAWLEY STREET.

1883.

EducTio, oz. 225

EATON AND BRADBURY'S

Mathematical Series.

USED WITH UNEXAMPLED SUCCESS IN THE BEST SCHOOLS AND

ACADEMIES OF THE COUNTRY.

BRADBURY's Eaton's ELEMENTARY ARITHMETIC.
BRADBURY'S EATON'S PRACTICAL ARITHMETIO.

Eaton's PRIMARY ARITHMETIC.
EATON'S ELEMENTS OF ARITHMETIC.

EATON'S INTELLECTUAL ARITHMETIC.
Eaton's COMMON SCHOOL ARITHMETIC.
Eaton's High ScHOOL ARITHMETIC.

BRADBURY'S ELEMENTARY ALGEBRA.
BRADBURY'S ELEMENTARY GEOMETRY.
BRADBURY'S ELEMENTARY TRIGONOMETRY.
BRADBURY'S GEOMETRY AND TRIGONOMETRY, in one volume.
BRADBURY'S ELEMENTARY GEOMETRY. University Edition.

Plane, Solid, and Spherical.
BRADBURY'S TRIGONOMETRY AND SURVEYING.
KEYS OF SOLUTIONS TO PRACTICAL, COMMON SCHOOL, AND

High SCHOOL ARITHMETICS, TO ELEMENTARY ALGEBRA,
GEOMETRY AND TRIGONOMETRY, AND TRIGONOMETRY AND
SURVEYING, for the use of Teachers.

COPYRIGHT, 1879.
BY WILLIAM F. BRADBURYARVniul concuk BART

FROM THE ESTATE OF
GEORGINA LOWELL

MAY 6, 1024

UNIVERSITY PRESS : John Wilson & Son,

CAMBRIDGE.

PREFACE..

to

In the preparation of this work the author has endeavored to make a text-book that shall aid in teaching the art of arithmetic without any unnecessary discussion of the subject as a science. All the subjects have been made as practical as possible ; and all obsolete and useless matter and puzzling examples have been omitted.

The number of rules has been reduced to a minimum. For example, but one rule is given for multiplication of fractions, one for division of fractions, and two for all cases of reduction of compound numbers, whether integral or fractional.

It combines oral and written exercises ; and special pains has been taken to give examples that are practical, and that conform to the usual experiences of daily life. In the Appendix are given seven hundred additional examples for written work, to be drawn from at the discretion of the teacher, for use in connection with the regular work, and for a general review of the subject.

Decimals as far only as thousandths (the place of mills in United States currency) are introduced at the beginning with integral numbers. The Decimal, or Metric, system of weights and measures has been treated as a part of decimals, and independently of any other system of weights and measures. Nu

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