Real Numbers Vocabulary

Front

Real Numbers

Back

All the numbers that can be found on a number line, including rational and irrational numbers.

Front

Natural Numbers

Back

Counting numbers starting from 1 (1, 2, 3, ...).

Front

Whole Numbers

Back

Natural numbers plus 0 (0, 1, 2, 3, ...).

Front

Integers

Back

Whole numbers and their opposites (…, -3, -2, -1, 0, 1, 2, 3, …).

Front

Rational Numbers

Back

Numbers that can be written as a fraction (includes repeating or terminating decimals).

Front

Irrational Numbers

Back

Numbers that cannot be written as fractions; their decimals never repeat or end (like π or √2).

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Terminating Decimal

Back

A decimal that ends (e.g., 0.5 or 3.25).

Front

Repeating Decimal

Back

A decimal that has a digit or group of digits that repeat forever (e.g., 0.333… or 0.727272…).

Front

Square Root

Back

A number that, when multiplied by itself, gives the original number (√9 = 3).

Front

Perfect Square

Back

A number made by squaring a whole number (e.g., 16 is a perfect square because 4 × 4 = 16).