Classifying Real Numbers in Pre-Algebra

What is a real number?

• A number that is always negative

• A number that is always positive

• A number that is used to measure one-dimensional quantities

• A number that can be written as a fraction

Which of the following is a natural number?

• 0

• 3.14

• 4

• Negative 5

What is the difference between natural numbers and whole numbers?

• Natural numbers include zero, whole numbers do not

• Whole numbers include negative numbers, natural numbers do not

• Whole numbers include zero, natural numbers do not

• Natural numbers include negative numbers, whole numbers do not

Which of the following is an integer?

• Negative 15

• 0.5

• 3.14

• Square root of 2

Which of the following is a rational number?

• Square root of 2

• Pi

• Negative 6.8

• 3.14159...

Which of the following is an irrational number?

• Negative 5

• 4

• 0

• Square root of 10

What is the characteristic of an irrational number?

• It can be written as a fraction

• It is a perfect square

• It is a non-terminating, non-repeating decimal

• It is a terminating decimal

In a Venn diagram of real numbers, which set is the smallest?

• Whole numbers

• Integers

• Natural numbers

• Rational numbers

Where would the number 0 be placed in a Venn diagram of real numbers?

• Irrational numbers

• Natural numbers

• Integers

• Whole numbers

Which of the following numbers is classified as a rational number?

• Negative 12.2

• Square root of 75

• Pi

• 3.14159...