arithmetic

noun

The branch of mathematics that deals with numbers and the basic operations of adding, subtracting, multiplying, and dividing.

Example sentence

“Simple arithmetic shows the bill can't be right.”

The stress moves: the noun is a-RITH-me-tic, but the adjective, as in "arithmetic mean", is stressed arith-MET-ic.

Related words

algebraA branch of mathematics that uses letters and symbols to stand for unknown numbers in equations.moduleA separate part of a larger system that works on its own and connects to the other parts in a standard way.geometryThe area of mathematics concerned with shapes, sizes, and the relationships between points, lines, and surfaces.courseworkProjects and assignments that students must complete for a course and that count toward their final grade.biologyThe science that examines living things and how they function.timetableA chart listing events and the times they happen, especially the arrival and departure times of trains or buses.