Unit 4 - The Real Number System

Front

What is a real number?

Back

A real number is any number that can be found on the number line, including both rational and irrational numbers.

Front

What is an irrational number?

Back

An irrational number is a number that cannot be expressed as a fraction of two integers. Its decimal representation is non-repeating and non-terminating.

Front

What is a rational number?

Back

A rational number is any number that can be expressed as a fraction, where both the numerator and the denominator are integers.

Front

What is a repeating decimal?

Back

A repeating decimal is a decimal fraction that eventually repeats a sequence of digits indefinitely, such as 0.333... or 5.123123... .

Front

What is a natural number?

Back

Natural numbers are the set of positive integers starting from 1, 2, 3, and so on.

Front

What is a whole number?

Back

Whole numbers are all natural numbers including zero (0, 1, 2, 3, ...).

Front

What is an integer?

Back

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

Front

What is the difference between rational and irrational numbers?

Back

Rational numbers can be expressed as fractions, while irrational numbers cannot be expressed as fractions and have non-repeating, non-terminating decimals.

Front

Which of the following is NOT a whole number: -3, 0, 5?

Back

-3 is not a whole number.

Front

Is the number 3.5 a rational number?

Back