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arithmetic

The branch of mathematics that involves calculations; such as, addition, subtraction, multiplication, and division, with real numbers.

This entry is located in the following unit:
Science and Technology Words from the More Recent Past to the Present, Part 2
(page 1)

arithmetic

A branch of mathematics usually concerned with four operations: adding, subtracting, multiplication, and division of positive numbers.

This entry is located in the following unit:
Measurements and Mathematics Terms
(page 2)