arithmetic
This term evokes a sense of foundational, concrete calculation. It is the bedrock of mathematics, focusing on the tangible manipulation of numbers rather than the abstract variables or complex theorems found in algebra or calculus. In a social or professional context, calling something arithmetic often implies a simplification of a complex issue. To say a situation is a matter of simple arithmetic suggests that the answer is obvious and undeniable once the numbers are added up, stripping away emotional or political arguments.
Uncountable when referring to the academic field of study. Countable when referring to a specific calculation or a sequence of numbers.
Meanings
The branch of mathematics dealing with the properties and manipulation of numbers.
"She is studying basic arithmetic in school."