
 arithmetic  Hutchinson encyclopedia article about arithmetic 
  In China, Egypt, Babylon, and early civilizations generally, arithmetic was used for commercial purposes, records of taxation, and astronomy. 
  During the Dark Ages in Europe, knowledge of arithmetic was preserved in India and later among the Arabs. 
  There have been many inventions and developments to make the manipulation of the arithmetic processes easier, such as the invention of logarithms by Scottish mathematician John Napier in 1614 and of the slide rule in the period 1620–30. 
 encyclopedia.farlex.com /arithmetic (929 words) 
