What is an Irrational Number?

Select ALL the numbers that are integers. Scroll to the bottom of the list before you submit!

• -5

• -5.25

• 7

• 5

• -1,234,000

Since fractions can be placed on a number line, are they rational?

• yes

• no

Is 0.33333333... a rational number?

• yes

• no

How did she convert  into a decimal on her calculator?

She calculated  on her calculator to show that it was an irrational number.  How did we know this was irrational without using a calculator?

• Because all square roots are irrational.

• Because 2 is not a perfect square.

Which of these square roots is irrational?

• 

• 

• 

Select ALL of the Rational numbers.  Be sure to scroll all the way to the end of the list.  

• 

• 

• -1.55555...

• 4.23

• 4.3456789794358.....