What are Rational Numbers?

The video tutorial explains rational numbers, which are numbers that can be expressed as a fraction of two integers. It covers how integers, certain decimals, and some square roots fit into the category of rational numbers. The video provides a checklist to identify rational numbers and highlights that the term 'rational' is derived from 'ratio', emphasizing the relationship between rational numbers and ratios of integers.

Which of the following is a characteristic of a rational number?

• It must be a whole number.

• It can only be a positive number.

• It cannot be a negative number.

• It can be expressed as a fraction.

How can the integer -3 be expressed as a rational number?

• 1/-3

• 0/-3

• -3/0

• -3/1

Which of the following decimals is a rational number?

• √2

• π

• 0.75

• 0.123456...

What is a requirement for a square root to be considered a rational number?

• It must be an irrational number.

• It must be a negative number.

• It must be a perfect square of an integer.

• It must be a non-integer.

Which of the following is NOT a way to identify a rational number?

• It can be written as a fraction with integers.

• It is a repeating decimal.

• It is an irrational number.

• It is a whole number.