Practice Flashcard: Subsets of Real Numbers

Front

What is the smallest category in the real number system?

Back

Natural numbers are the smallest category in the real number system.

Front

Classify -5.

Back

-5 is classified as an Integer and Rational number.

Front

True or False: Integers do not contain decimals or fractions, but rational numbers do.

Back

True.

Front

Classify the number 0.04769165821735......

Back

0.04769165821735...... is classified as an Irrational number.

Front

True or False: Zero is a counting number.

Back

False. Zero is not considered a counting number.

Front

What are Natural Numbers?

Back

Natural numbers are the set of positive integers starting from 1 (1, 2, 3, ...).

Front

What are Whole Numbers?

Back

Whole numbers are the set of non-negative integers (0, 1, 2, 3, ...).

Front

What are Integers?

Back

Integers are whole numbers that can be positive, negative, or zero (-2, -1, 0, 1, 2, ...).

Front

What are Rational Numbers?

Back

Rational numbers are numbers that can be expressed as a fraction of two integers (e.g., 1/2, 3, -4).

Front

What are Irrational Numbers?

Back

Irrational numbers cannot be expressed as a fraction of two integers (e.g., √2, π).