1. Go Math Lesson 1.2A

2. Goal: 8.NS.1 Know that the numbers that are not rational are called irrational.

3. Real Numbers

4. Definitions Natural Numbers - the positive integers (whole numbers) 1, 2, 3, etc., Whole Numbers - The numbers {0, 1, 2, 3,...} etc. Integers - A number with no fractional part. Includes the counting numbers {1, 2, 3,...}, zero {0}, and the negative of the counting numbers {-1, -2, -3,...} Rational Number - any number that can be expressed as the quotient or fraction p/q of two integers, with the denominator q not equal to zero. Irrational Number - A real number that cannot be written as a simple fraction - the decimal goes on forever without repeating.

5. Natural Numbers

6. Whole Numbers

7. Integers

8. Rational Numbers

9. Irrational Numbers

10. Name all of the sets that apply. 1) √5(irrational, real) 2) -17.84(rational, real) 3) √81/9(whole, integer, rational real)

11. True or False 1) All irrational numbers are real numbers. (T) 2) No rational numbers are whole numbers. (F)

12. Identify the sets of numbers that best describes each situation. 1) The number of people wearing glasses in a room. (Whole) 2) The circumference of a flying disk. (Irrational)