Home > Reasoning > Big ideas > Deduction


Deduction involves drawing a conclusion from a broadly accepted proposition through one or more logical steps.

Deductive reasoning is an important skill to be developed in mathematics classrooms at all levels.

Deductive reasoning

General principles can be applied to specific circumstances to arrive at a true conclusion.

Halving a rectangle

A student used if–then reasoning to argue that rectangles can be halved in an infinite number of ways.