Number System Review

What are your counting numbers (1,2,3..)?

• Rational Numbers
• Whole Numbers
• Natural Numbers
• Irrational Numbers

The set of counting numbers which is also a subset of real number

= {1, 2, 3, 4, …}

• Rational Number

• Natural Number

• Integer

The set of natural numbers plus a “0”

W = {0, 1, 2, 3,…}

• Natural Numbers

• Integers

• Irrational Numbers

• Whole Numbers

True or False: Zero is a counting number.

• True

• False

The set of natural numbers, their negatives and 0

= {-3, -2, -1, 0, 1, 2, 3,…}

• Whole Numbers

• Integers

• Natural Numbers

True or False: Some of the integers are natural numbers.

• True

• False

• Integer

• Rational Number

• Irrational Number

• Natural Number

True or false: ALL fractions are Rational

• true

• false

Classify the following:
0.04769165821735......

• Irrational
• Rational

• Rational

• Irrational

• Whole

• Integer