An arithmetic series is the sum of the terms in an arithmetic progression.

Arithmetic.

Sure. There are other applications of arithmetic, but algebra without arithmetic is impossible. A broad knowledge of arithmetic is essential for mastery of algebra.

Joseph Ray has written:

'Primary elements of algebra'

'Rays Arithmetic Series'

'Ray's new higher algebra' -- subject(s): Algebra

'Key to Ray's new arithmetics' -- subject(s): Arithmetic, Early works to 1900, Textbooks

'Ray's new practical arithmetic' -- subject(s): Early works to 1900, Arithmetic

'Ray's new practical arithmetic' -- subject(s): Early works to 1900, Arithmetic

'Three Thousand Test Examples in Arithmetic'

'Key to Ray's new Higher arithmetic' -- subject(s): Arithmetic, Textbooks

'Ray's new test examples in arithmetic' -- subject(s): Problems, exercises, Early works to 1900, Arithmetic

'Key to Ray's algebra' -- subject(s): Algebra

'Algebra.' -- subject(s): Early works to 1900, Algebra

'Ray's arithmetic, second book' -- subject(s): Textbooks, Early works to 1900, Arithmetic

'Ray's Modern elementary arithmetic' -- subject(s): Arithmetic

'Ray's new higher arithmetic (Ray's arithmetic series) (Ray's arithmetic series)'

'Ray's New Practical Arithmetic' -- subject(s): Arithmetic, Textbooks

'New intellectual arithmetic' -- subject(s): Accessible book, Arithmetic, Mental arithmetic

Properties of Arithmetic Mean?