Number Types And Properties: Math Terms Explained

Plain-language definitions of every number types and properties term your child meets in school, each with kid-friendly explanations, worked examples, and common mistakes to watch for.

Rational number

A rational number is any number that can be written as a fraction of two integers, with a nonzero denominator, and whose decimal form either ends (terminates) or repeats.

Real number

A real number is any number that can be shown on a number line, including all rational numbers (like fractions and integers) and all irrational numbers (like √2 and π), each of which has a decimal form that goes on without skipping any place.

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