THE PRACTICE

OF

ARITHMETIC.

THE

PRACTICE

OF

ARITHMETIC:

A Companion Volume

ΤΟ

THE PRINCIPLES OF ARITHMETIC.

BY

D. O'SULLIVAN, PH.D., M.R.I.A.,

ONE OF THE PROFESSORS IN THE TRAINING DEPARTMENT OF THE
COMMISSIONERS OF NATIONAL EDUCATION, IRELAND.

M. H. GILL AND SON, SACKVILLE-STREET;
SULLIVAN, BROTHERS, MARLBOROUGH STREET.

LONDON: SIMPKIN, MARSHALL, & CO.
EDINBURGH: JOHN MENZIES & CO.