Get the Points and Get the Math Jan 16 CC Alg I #4

From the Jan 2016 CC Alg I Regents

Jan 2016 Algebra I 4

For some reason the Regents loves rational vs irrational.
Look at the 4 expressions on the TI-84.
Which one(s) result in something different?

Jan 2016 CC Alg I 4 TI84

If you said (II) you are correct.  What makes (II) different?  
It is irrational!  Do you see a pattern?  You should not see a pattern 🙂
Some popular examples of irrational numbers are: √2, √3 and  ∏.

In contrast, all other choices are rational.
What word is in the word rational?  (sometimes s’s say rat!!)
OK, um what Math word is in the word rational?  (ratio!!)
Rational means can be written as a fraction and rational numbers terminate or have a pattern.  -.025 terminates as does 5 and 21 so they are all rational.

 

 

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s