算术

arithmetic / sums (mathematics as primary school subject)

to regard as / to figure / to calculate / to compute

method / technique

various genera of flowers of Asteracea family (daisies and chrysanthemums), including Atractylis lancea

arithmetic series (such as 2+4+6+8+...)

The Nine Chapters on the Mathematical Art

formula in mathematics / arithmetic formula

decimal calculation

arithmetic mean

arithmetic mean (math.)