1. Rational & Irrational Numbers
What is the difference between rational and irrational numbers?

2. Rational & Irrational Numbers
In this lesson you will be able to state the definitions of rational and irrational numbers and apply the definition to recognize rational and irrational numbers.

3. Review
A rational number is any number that can be expressed in the form a/b where a and b are both integers and b is not zero.
Includes:
+/- whole numbers, including zero (integers)
All fractions and mixed numbers
Any decimal that terminates or repeats

4. Irrational Numbers
An irrational number is any number which cannot be expressed as a fraction a/b where a and b are both integers and b is not zero.
- Includes decimals that never terminate and repeat

5. Irrational numbers must be represented by a symbol. The “……”
If irrational number never terminate or repeat, how can it be represented?
Irrational numbers must be represented by a symbol.
The “……”
Square Roots of Numbers that are NOT perfect squares. π
Or any number included with π

6. Practice Which of the following are irrational numbers?

7. Conclusion
In this lesson, you learned that an irrational number is a decimal that continues forever without repeating and that irrigational number must be represented by symbols. You can also determine whether a number is irrational.